Malicious PDF — malware analysis report

Static analysis result for SHA-256 7001b93f4ae1cbe0…

MALICIOUS

PDF

64.4 KB Created: 2021-05-03 09:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8645414b231e7f036469554c4f4375b9 SHA-1: 2c5f42299e7ca24ee3932b2499d7448b8ee69246 SHA-256: 7001b93f4ae1cbe06e2768201c4ff2b0dd03e2f4086bd29a9a8a4a8731d7efb4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature. The presence of multiple compromised CMS upload links suggests a tactic to host or distribute further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

Heuristics 5

  • 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.
  • 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://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088218c6e6dd---28419762169.pdf In PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/7ebjl2n179j05ri15ibp77s9l8/19864522849.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/komajuna.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd0a0b9dc2---89553672612.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/7h5rso9hndrpbnhbcfh8hbq2k1/80293541329.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/e20b186d660da430279e0a727e72b862/bapemanokavewepokirobum.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/dfd3dee7d0c425911c5fe200a6f6fb0f/13381418591.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736b4029e09---84664800492.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/pitamelisupewo.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/d5def23f2c1ea3b4c8a401d03ff5672e/12418836652.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/e7d9f75e575f8c72b734284ff532ff5e/pufapika.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/lurenibidetiwerogugi.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/gerazavopazixo.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb2f9c0c2---niniko.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/5dca492c47f972454caabccc973eb4aa/xapaxoderajapaxogasenofiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=passive+transport+diffusion+and+osmosis+worksheetPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 5464 bytes
SHA-256: 0c4ffbd43a8ae84c7a6108068a39c336c23b1562ce5314cfc20c1a22c156b048

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