Malicious PDF — malware analysis report

Static analysis result for SHA-256 7240caf4f4f1b4fb…

MALICIOUS

PDF

93.2 KB Created: 2021-07-23 14:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1f00ad31295905f33afa5d749eb50c23 SHA-1: fc2366788f957819ffed514a9f19202b48bb5809 SHA-256: 7240caf4f4f1b4fb3b4684d33d0d351dead1b933660dfdd395f55e08d00a0831
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or tech-support scam. The document contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content or redirect users. The 'SE_CALLBACK_LURE' heuristic specifically indicates the document is designed to trick users into calling a phone number, a common tactic in callback phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://almoheetmanpower.com/public_html/userfiles/file/31125765984.pdf In PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/d6f9ajck5n659qs6veie3helj4/depuf.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/37822177820.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/5a926ba263bdb83c1ec5cb1df2fb4658/pesugiwigixexage.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/40943981800.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/terifisomumuradulizuvon.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd8376ac42---56474516320.pdfIn PDF document text
    • https://advik.net/userfiles/file/resufarubesebaxo.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a139eda631---87302069882.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/be748fe82ffe577e12c82af73f98147f/zofogizuzigazinemewilun.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tikerudidiwezidapufitav.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb17332f5c6---jivavoved.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0347f99372---jinuvodef.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/ruxoz.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/gudotagipikuwaduni.pdfIn PDF document text
    • http://oprfhs70.com/clients/879438/File/17784696441.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/gifavadezurazabimasujom.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/bawotikatuza.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/5398962322.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d3ec2a4f2712617752ed265f0a79cc65/veloxivawiro.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/zinezotipovika.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ae12ab56d9c3f052ce6d957736ff2a63/18416191659.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c69810376c---kezuzupolarubut.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/34539262959.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f039d9640a---jagefirexupu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=dc+unlocker+username+and+password+2021PDF 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_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 17460 bytes
SHA-256: 9d78734301b80f74fd600418ba5349e05de27bf3bb783d5e35e6354e9979e51b
font_01_sfnt_off000134c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDD 11060 bytes
SHA-256: c5e1943f842ca877c95daca77ecda9d7d2a795351cae6f00b6e7a731d642f402

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