Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dee613229260996…

MALICIOUS

PDF

85.4 KB Created: 2021-07-02 08:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6402f99c75db1d7e9cb5b2b3fed3affb SHA-1: a3efaf1b77d24a44a49cddb40e41cf4a2e74f588 SHA-256: 0dee613229260996e81f861280e01e2d433a74873a8aa33fc0d4366dc598be02
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple domains, many of which are hosted on compromised CMS platforms or disposable hosting. The embedded URLs suggest an attempt to manipulate search engine results or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/044d3253eef9ac06844435cdbd996204/koveximananobujatov.pdf In PDF document text
    • http://wujipacking.tw/upload/files/10276124119.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/79522933428.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/labilabuzutitomug.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/49996363656.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd4de7f6b9---56396854956.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/kuaeobb0a0ordtpf2f5271tme0/bowasujemuwofor.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/68ba8b9152b1a1b001fbaf2614f30527/jifuk.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/65739820404.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093cbc77e61c---funuzelaxivumafuxan.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/21735119513.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/kewovalaxaditav.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/dc4ok92sfk4c693qjv2cm06ppt/bilonipinome.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/59960411234.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e68a456d66---94874944948.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/604peqhoivsgqjllr1m1gqf1c8/xavarefo.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/kazumenizizinipase.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/44037276266.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/49587774653.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ece3cf203a---sudalujilojegegiderotavet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=urdu+meaning+of+couragePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012453.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12453 20160 bytes
SHA-256: 1edd1983066d66b47840663477b5c8982626a70d16b6048c78b63c76baf88926
font_00_sfnt_off0000c8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B4 16804 bytes
SHA-256: 61c17cc9d1c6d99428bc8cd62eacbf872c0903df3a0d8a406a7e92e8bb7df1e9
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C60 10612 bytes
SHA-256: 42f692093b94a46ec54a31bc32cab50dba39715b639d9b94a4fc694153fcbe96

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