Malicious PDF — malware analysis report

Static analysis result for SHA-256 631caf9b7679eb95…

MALICIOUS

PDF

70.3 KB Created: 2021-07-04 11:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c7a89a78c23dab0537095c5f0d015f7d SHA-1: b6129a51b225f5d10b08a716ac9623735a9bb7b6 SHA-256: 631caf9b7679eb957cc393db0f33b114f974d7586b2fe2c0a3729093afcaf722
124 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and exhibits characteristics of a link farm, directing users to multiple compromised WordPress sites. The PDF document's structure and embedded URLs suggest an attempt to lure victims to these malicious hosts, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3494

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://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/fde4118040dd932729abb9b8b9fc9fc5/kavivojemitalagekodunem.pdf In PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b31c7f81---75914025798.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/41288731875.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/nanupina.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8793995d5---58986402204.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/42892121015.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/00ed69ee1e2a0edbfdb2d20b18cf05bc/99794316210.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/8sfmbhbplc23opuvg5cq4uop9u/52144490471.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/wodavolebekumitamesewoje.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2ddc9e955---lileduzukobunimigopak.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/larojokemabi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a865fcd1862---29183343042.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/16732d70cf2850ac1a2222687af0e874/19307489316.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/dazomepudetuwek.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/300247108681.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/cb23e9bcfbd88fb6ae3747eb1382ee44/67127693563.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a1a5e4f13---ruzogajogoxovu.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081131688866---gexarupe.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/r8kd20n53eec7dos186ht96pu0/15833358622.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944a55ef422---54671686869.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/9d0bfdb899c8540f001c4166d4f13d4b/weniremavijijevukivobal.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/38e677be4c524cc6249074f81075e552/motewulazoxepikep.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/mdhfdhp24dstdqes9j5cf64nc7/gewopegu.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/eho65ftldovs8f32rmr7tu62fv/riluxifufaxexowafegatobo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d81884973d---zixupeve.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/delulunulojuvumasekanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=quotes+about+being+pregnant+and+alonePDF link annotation