Malicious PDF — malware analysis report

Static analysis result for SHA-256 267d7b502a129909…

MALICIOUS

PDF

60.9 KB Created: 2021-06-05 17:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4c2851846cb72441fcb85fdfcde863d1 SHA-1: 72a3ed53d300c7880c8f0b7f6ba19605dc91ff4d SHA-256: 267d7b502a12990920960a5e3441ed0ac2cdd685edebc419f9095e0516f2e10f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, pointing to numerous compromised websites, many hosted on WordPress installations. The embedded URLs suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8214

Heuristics 5

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=cavaleiros+do+zod%25C3%25ADaco+para+pc+fraco PDF link annotation
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/24bac9316797fcd91b8bd0a0fb99143b/89042584720.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160747f0fb6765---fizigi.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4c0a87ab7---ruguzivabirog.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607473a4000cb---ninekotumetozojujatur.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/sugikusetoma.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2642cc2b5e62d7db9578b6bcbe524eda/70646665629.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/81892289608.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/f57e2f3cf126bbc8b19b49ce76d8d161/78499423904.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/d2a2856941a136ed6d41d63df071cca4/gasagedipomurajuvinoz.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/lukolat.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/34e3141e953f4d82aa6cc4ff76bb3430/luromeropaxalevubavopaj.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7ae94c8fc---kokukotug.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/xipabufeku.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/3f95abff83e40f4551a248ca43b76160/56270877336.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b74bviihp0udfqel9b56p210v/xidumaxatidanofede.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870cee4999a---zasanuderejunig.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826578bdb22---wewulipurunegix.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/ef667a2100877c0f530046578721c0f9/bufipapilewiginoni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD611 3636 bytes
SHA-256: 8b955f15fed35a5c2aead6f7f5497eba55f6e4496a6fcd9c14897d486555f66f
font_01_sfnt_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 5220 bytes
SHA-256: 2f9a9729f4054323035644e74f6eb781002395d05c7c0e4ccae11fb5f5e56ca4

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