Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ff787deb0ad644…

MALICIOUS

PDF

124.8 KB Created: 2021-07-03 00:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ad489182a669fc5a5dc1642ac1488713 SHA-1: a00f2f630543f15d9afcec766350b9de1569cdb1 SHA-256: 03ff787deb0ad644f0987a28d2c23264d34f3636d8055503a4d1dd7dd4a93960
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to external websites. Several of these URLs are hosted on compromised WordPress sites, indicating a potential phishing or malware distribution scheme. The file's structure and the presence of many links suggest an attempt to lure users to malicious or compromised content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9098

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758a220b2c8---93984991156.pdf In PDF document text
    • https://loctra.net/userfiles/file/wakeriwinova.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/e384ab15774ae17764fcc2bb5eaf0460/79644936577.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16079ebc55afea---18048726733.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/34490217846.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/dedodegojorawumu.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/44040737615.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cf2a5e5a9---85532027307.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/67000388932.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607480283bc21---morozetabesanifit.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16073caa5f21f6---80746072834.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/mepasonusaditemo.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/95ba33adc31cc53cb4e220938ed801f1/95760202539.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/68da50066092f6ff15c92627478a1abd/62935930574.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50b045d9d---29350299106.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070d6afe71e5---94460817084.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/c6292be66390016e861de6036f5885ce/54673074439.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/jikodabazodamowolod.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/4f7055912637d38a39b38f395d3e4a6d/64586849996.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/c4c199a56d4749d61cb24e8b39affe46/94226320934.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/xorivagafowokuk.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/99e9a1dacfa8dfa9bef64b28334b2f34/14446705757.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9b267141b---94897140463.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c69f79c43---kozas.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/88029943085.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/fogomu.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077a6db9aaf2---giniwejebada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=clef+meaning+in+musicPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15848 10492 bytes
SHA-256: 9593fbbfb8cddfea1a9d0218c0724f7fc417ba2e0b3295b0e8b485f42a1eb3d3
font_01_sfnt_off00017015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17015 2408 bytes
SHA-256: 2ed69f9dfbe1e860b68e2c4b8f6fb885e944d69c48e4a3655097806ff9c26658
font_02_sfnt_off00017a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A6A 21392 bytes
SHA-256: 713143fc052161fc0e045d76abf8df5151441a35dd6b10da128f7512d8b210d9
font_03_sfnt_off0001b111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B111 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001c922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C922 17552 bytes
SHA-256: 3cdc86c26958101934a344cc6049f5fd70f973f217648e8ba8ab0617b90a9050

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