Malicious PDF — malware analysis report

Static analysis result for SHA-256 9275ce01d44c7566…

MALICIOUS

PDF

97.7 KB Created: 2021-07-17 04:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 39e0257efd442a64d8883a3929edc796 SHA-1: 29a76b4170b35385a55b14a886787d016e9ebb40 SHA-256: 9275ce01d44c7566d1b787caa8aba2fe5464d375c092fab497290b60ec6eec20
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic findings and numerous unknown URLs are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe639b5c17---48286105744.pdf In PDF document text
    • https://mallncart.com/userfiles/files/mebojusifiragenif.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e88669b81---73467096641.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160827fb0b4814---rodosagoxatesitizebamam.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/xawudifibarevovabagaw.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f106c8ec719b8ae6b87b7833e29096a6/filinetaxijujapazusi.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089fdc58e093---85923150154.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/45380841352.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/aeb824decfffd3e41476665a91c2a846/91366635400.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/p6jakvege1soh6er3cvl8mhmu7/pikiduwonevunidezapewe.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/3b007a9eb950e667f75d192c0a11c877/91741320925.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/wagapigutawegu.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16086719dc1923---sorewijid.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/30033160225.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8bda31ac0---vusototumajusazo.pdfIn PDF document text
    • http://gakuso.jp/image/_ckimage_file/42941862812.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/pixobuni.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae22584c13f---68940965693.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e539ca01b89---53729170417.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/85565408210.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160712d3402f58---16155056337.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=parity+meaning+in+englishPDF 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
font_00_sfnt_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 10548 bytes
SHA-256: abffa42cfb80d6b080b3c1254f50c640c5e6f7e3e06beb6103e621ce4634cdc6
font_01_sfnt_off000113eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFC 17100 bytes
SHA-256: af6352c6d9b0e605407c38fa74e817a8d81e4c92f12c4f8e92d0996264b0d156
font_03_sfnt_off00014537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14537 19608 bytes
SHA-256: 0c86e510bed742d9e6b068e2f46b3a5bcb58359447601940e88fe6c8d0367fcc

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