Malicious PDF — malware analysis report

Static analysis result for SHA-256 7698de421b0c82fb…

MALICIOUS

PDF

61.3 KB Created: 2021-06-05 21:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d988dbd6d1fb3d89e1c9a4082d73a94 SHA-1: d360912e601f4b705a0fb304909c118c12409f58 SHA-256: 7698de421b0c82fb00867ef488952bcde55a2549d04fd3d3db447252e7b6165b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains numerous links to external resources, many of which point to compromised CMS upload directories and disposable hosting. The presence of a raw IP address in one of the URIs and the ML classifier's high confidence score indicate malicious intent. The file likely serves as a lure to download further malicious content, potentially exploiting vulnerabilities in PDF viewers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://pixomot.ru/uplcv?utm_term=mazda+3+repair+manual+free+download
    • https://aslimitada.com/userfiles/file/diletamosenuka.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d121439fe---dupulenumuvuda.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/tm4eubm9j96vmirf24sc9nk974/94999632563.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070286438ed7---51062186734.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfb1facc1b---kajifaj.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b924555ae9b---58975698973.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d30eb18d43bfff061199bd5fb8422b99/50813139858.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee5da22246---75625092674.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cfebeebdb---5166086611.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608215a61c043---87179490665.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee25b097c6---81256268904.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fc430c81b---2369583530.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5e151468d---vabuxuwak.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e8255e61b---12680075263.pdf
    • http://www.tobywells.org/media/fckdir/file/84632436503.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce0a.bin
c6f8329a64a4c44065f721e87ea0001ee66019995d2a5fd13fdd2040396c10df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0A 5320 bytes

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