Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0765ce2cb6d98d2…

MALICIOUS

PDF

67.9 KB Created: 2021-06-19 10:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 50d60d42f68aa30890922b2930981cb0 SHA-1: e6e32d224c6dfe902367bea5c454f59f157439bc SHA-256: a0765ce2cb6d98d2437cb5b9cf231bfeb2be7dc8063090bf4390b951f14f7b00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded links, many pointing to compromised WordPress sites, likely serving as a link farm to redirect users to malicious content. The document's content and structure suggest a phishing lure, aiming to trick users into visiting these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://coretry.ru/uplcv?utm_term=germination+lab+discussion PDF link annotation
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/kraqnt9ut7d6qjmbmk9hu17qd6/46042112803.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a850aa3320d---89590959751.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2eb31ec91---44926287608.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b966b0999---86816300975.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/be6b6a4ee3db3181d0d44200f1aca686/5160972442.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/wiwowotixesokaxoxegefad.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/77071999326.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bf14e6e84f5---wesomurekerutegalogux.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/qjui90tk9ljdqsgrpr2cnc8io1/8887643584.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/wapale.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d70fe058c---lipuzefememolalupikud.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/kugozesireponawukenowifar.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7705917a6---34515610535.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da5f7e00cc---28859574892.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/8c2eeb329a166cc32ddd87024b1e0891/71873691507.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/qdftr9qj5tb2d2i7rhmv4vblj2/69427605667.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/tutonupobedidul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 5256 bytes
SHA-256: 45ee7c32ee9cce58d55c6beaed62584b6352a55d432a9fc1d8a8ff3276baccff
font_01_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 9892 bytes
SHA-256: 61748830f63b205a61494c62eed53112e7e19278be05e3821e67d5ed9f40246c