Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9ae8bd799cfad9…

MALICIOUS

PDF

97.4 KB Created: 2021-01-19 11:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e97bbbc577a6ae714ea371666fe7c77c SHA-1: 178f0eeb9063ad136a65bf0674511997a31f78e5 SHA-256: eb9ae8bd799cfad9d0a643771042162b6ca47ca658b71f69168f61ae11505e16
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan and by a machine learning classifier with high confidence. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that the primary goal is to redirect users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=fnaf+toy+chica+voice+lines PDF link annotation
    • https://cdn.sqhk.co/tudusiki/jehghOV/vr_warszawa_dla_dzieci_wydarzenia.pdfIn PDF document text
    • https://pevigegokepos.weebly.com/uploads/1/3/4/3/134366184/6850229.pdfIn PDF document text
    • https://sorajofuwomukiz.weebly.com/uploads/1/3/1/4/131407138/penopakuwazuwa-ritulivodafu.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/RYOu5R2/2575877920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f882bdb14a53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5fbfb2232e819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5fad9dba6aef3.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/jRjgggs/96746047940.pdfIn PDF document text
    • https://rewojomivatal.weebly.com/uploads/1/3/5/3/135345623/volixix.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/80eac4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5ff781c94dc4e.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/gjLD3op/10221534591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493881/normal_5fdd35eef0235.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/hgTLno4/kids_chores_and_reward_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_5fda0ea4a9da5.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/isRiehd/car_racing_free_3d_simulator_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_5f999e123faeb.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/jdia3MZ/napipikedawede.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/jhhivZG/98847514831.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/hgfChbl/banner_saga_2_character_deaths.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_off00013244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13244 4992 bytes
SHA-256: 62afe4ebb2fd171d7ba684a0e0bdb7a82d2f3a6da4d60fa23571027171c83508
font_01_sfnt_off00014359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14359 18568 bytes
SHA-256: 7aab4cc7f0350894c01af091165c10a2f89b27ac98b454517c8a5dc06dc954f9

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