Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e3190b35f251cd…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 03:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7b1b8b58f2f5edfbc4f5a3d842959187 SHA-1: caa8fe24d2bab82b64891869eeed1b5c7fd82ddd SHA-256: 72e3190b35f251cdae5eff2925c1c96b0d018f8302e50ea93dfa581d7470ea7b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of ClamAV detection and ML flagging further supports its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • 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 https://garglob.ru/uplcv?utm_term=watch+judgement+night+online+free PDF link annotation
    • http://yourmoneyyourbank.com/uploads/File/51581837574.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/64834528650.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210908_55D379024459951A.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/22fc284a431cf3f19125b1e355df802c/14992665892.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/sifijedukevezufipuvot.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/73358067627.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210908113512843472.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/39416255587.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/39192866443.pdfIn PDF document text
    • https://micsys.in/userfiles/file/74955303255.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/zogebasolotigomejeze.pdfIn PDF document text
    • http://gewald.ru/content/Files/vuxejazusexupotipunixu.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/mibajowobusidotetevimusik.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/60ff8436792107ee5a24747482479f4d/41764354768.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/43287848859.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/33500340572.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/mipimugojureminitit.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/13245933401.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429938cd83e---gokivaxunepaf.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7ec0a9e65526c37dc9da508da8b48421/7267625659.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/2011320309.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/14599779630.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/6c08a39379cde407b7d6fb18349cda5a/27177926125.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/10540598308.pdfIn PDF document text
    • http://dominoliberec.eu/images/file/files/fofiratewukofodunezizel.pdfIn PDF document text
    • 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_off0000d8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E1 10976 bytes
SHA-256: ab83f65e38a14087f865f526df836dab77ae9c5ba3ea9e9c507414ede333062c
font_01_sfnt_off0000f1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EC 18068 bytes
SHA-256: 9140a674214d99dd1b65be55844c9f68a80b6fc4ad2ab2c9828cc28f2f265bbf
font_02_sfnt_off000120cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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