Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ed3ea0c35eec98…

MALICIOUS

PDF

91.8 KB Created: 2021-08-05 23:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 18755c9265500017f7b8bc8212816b7c SHA-1: cdbcc9fd720872b729e81fca9df189dcfa76eadd SHA-256: e2ed3ea0c35eec98084a96ee531f2b34637b388ea1e75b44fcbdfc1b883ffbba
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a callback phishing lure. It contains numerous links to potentially compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing attempt designed to trick users into initiating contact via phone.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dentish.ru/ckfinder/userfiles/files/jijitifodudaxepul.pdf In PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/u8i941eqr935750e1b2g5jfq5d/56296606724.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/ead9f82a0e0fb4cb6742334ca0d53d5b/rilopifebikepuxiwil.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1a6750c6d---59952695464.pdfIn PDF document text
    • http://allasclub.com/campannas/file/64547499676.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/91a9ac6ceed80fd0754f066b9a37870f/74779808946.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/famexudivelipi.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2b77acf1b80b763dc03ae361ccf8bbbd/juxexatobobav.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/44616344311.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e67bd5aa4ca---tarakasugixebopowosas.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/posubipanudatav.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/sojemav.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/9e6a4e0fc6ede0f1d091eaa041f5b069/mogurobavebesi.pdfIn PDF document text
    • https://harom.ro/files/file/renososusogojotepupinizu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/1rg85jaedq2jnrf77ifkm93eln/74074395942.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/f1e43005a7cdd6e3fa7d473a6b06ab9f/jivokosedijilagupibanulu.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/nkipc9cd98bev43925h65p0hr6/juworegoturimedekis.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/2b7738fa272412629edd965a360016f8/neluxezexuzir.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/34966167812.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/eeeff9e4e8bab13e560231a7a66bf211/87401202626.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c5479eeadd2---xanokadewolitu.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/24046575711.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/8862935774.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/sebewame.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/40484282492.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/46354a97d86ad86ef5e129953e20de59/zatisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=parkway+mobile+home+parts+prestonsburg+kyPDF 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_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 11232 bytes
SHA-256: 1df3ebc0d47f9578bb0d15a2e4ddae1d405df56f4c5f76d46db125e284941b1c
font_02_sfnt_off0001325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325F 17824 bytes
SHA-256: 42a03bcce0352f5d99b4797f8ccb1debe93eddec4b34251461bd4a1512d9f83e

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