Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bee47c7de5b6806…

MALICIOUS

PDF

114.0 KB Created: 2021-05-03 21:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e08132551b313b38645d23c8bd767beb SHA-1: e22872bd1e812a29bd8672745efd0eb937c41b30 SHA-256: 5bee47c7de5b6806cb022ad939b16f42140559ff6af30b2f58a17862eac10572
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous external links hosted on potentially compromised infrastructure points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/en7p38qqr807pc2ckusoc5ei46/bekubazixogod.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714735569c3---92068435690.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a41a68389bc8da83ca6e3496401d36c0/jivuturorarebikoloki.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080f5a73bf85---7168955602.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/bim064ol928tcf5s81g8pv073b/9678568026.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c571c2b12c---gixokizapaliteroxuvi.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a509156bd2548afbbca846911439233e/88720940348.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607503a9c5e67---36394599462.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/6c2f8961c27fc41a86aa300ebca95161/jusifateguvo.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075360cc4f52---tisewefogimijimezofepafe.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7a80a870bc05917959f95839f4ccb30e/17807686523.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/cag19lpckniplsv9nrnq4942i5/52047213588.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608074ab9dd30---5914062644.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608111e650622---19291484621.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba1d1e57e---2991142284.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/opf8vbn8sjqe6tso11h0osqfi0/15129711371.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=write+bitmap+to+file+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018671.bin
05f9e5e60e8f39727ed1df4e1114ac804d02bd836aa63e419c91f76ae5a87440
pdf-font-stream PDF embedded font (sfnt) at offset 0x18671 5164 bytes
font_01_sfnt_off000197ef.bin
e1ea77fd5a2d812f4902fa6dee9b0beb852e1a82adfaa537bd4c4e7502c4484b
pdf-font-stream PDF embedded font (sfnt) at offset 0x197EF 10172 bytes