Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7e44451237904b…

MALICIOUS

PDF

89.1 KB Created: 2021-07-31 22:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9cc59ab9631eb87f2ba4184f39080b9e SHA-1: 0284258ff534ad65e921ca3473db2311bde7aa96 SHA-256: ed7e44451237904b791e77c715af24c9395612cdf9c383316c015a31d53a52fe
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern appears to be directing users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/k2v99npaaombrr3fmb6r1cu6r9/vewojiwolixaxifumelus.pdf In PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/vilifajajat.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/98979523678.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944ebd024f2---doseketa.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/jamememet.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/fugipuxivulufoves.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/a543e392f5804d3c838e58ba39f45135/livojisari.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b0f288a00---8930923625.pdfIn PDF document text
    • https://vpmemorial.net/images/file/pogujutepezize.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c75c1ca09---wevetumegimumog.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/16076227421.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd0e053cab---6574269913.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079c40722fb2---75864654812.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7856b9c6aa45a744b13aba85ab29dc51/giwiritebafetiwakemube.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/80096cc891e83333a95e8ca5df1d97ee/vuzozapezujamukumeba.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e445eed9043---24684593887.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/18634030301.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/97864349896.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/0edvgjt4vhvm2v0msr3g3l587c/83194388430.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/vqav4m2bqm3l3sbnafeot5k5f4/74728157471.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/45357566558.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/77113004762.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=libros+de+teor%C3%ADa+musical+para+principiantes+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 11040 bytes
SHA-256: 1b1713f9d3b1563a4a099b766a79e23beaf893692f731241a2230178ba5433b6
font_01_sfnt_off00010d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12534 18184 bytes
SHA-256: 180ebb4e38a7b3167c9a1a82508bf9b1909b6b5311867449d4654799c9e246e9

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