Malicious PDF — malware analysis report

Static analysis result for SHA-256 2559bbeca7f99c30…

MALICIOUS

PDF

72.0 KB Created: 2021-02-14 20:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7154f734c3a285731480c1a22a85d79d SHA-1: d90e79953b8a975b96a9f6ea064efe17c3e0d6f3 SHA-256: 2559bbeca7f99c3045ce9ac6547f58d10b1bee1c049644192b59584b0a144aec
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs points to a domain associated with phishing or malware distribution. While no scripts were directly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://maypoin.ru/wb?keyword=cbs%20all%20access%20canada PDF link annotation
    • https://cdn.sqhk.co/ligumorik/hZdYsDQ/tiktok_vs_youtube_funny_videos.pdfIn PDF document text
    • http://art-practice.org/833343584n6005.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/EHXNBjg/chess_techniques_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387815/normal_5ff0a5803d954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fec6c72225d4.pdfIn PDF document text
    • http://mmamba.ru/baal_veer_returns_episode_27ny6r1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_600f544a558b8.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/dU2jj8e/missile_defense_agency_news_release.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/hbTmIsg/polefawixojeguzibetev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_601b8406123b5.pdfIn PDF document text
    • https://cdn.sqhk.co/zaxuloxedu/ZhglGje/cut_and_paint_weed_control.pdfIn PDF document text
    • http://chelobaka.space/kobepesinugapupufesijik94p78.pdfIn PDF document text
    • https://lipegarexepi.weebly.com/uploads/1/3/5/4/135400683/9366251.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/nakirapafutezasa.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/35092414719.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/46346309734.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/pikinaradusunobu.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/wukupa.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/fizegavabab.pdfIn 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_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 4880 bytes
SHA-256: 11c2e962f75a811c32ac2237944274dc0b7775f7de83786e8d3acfef4cc96be9
font_01_sfnt_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 10712 bytes
SHA-256: 1107156a52cf54bb3cd07eb5a3d43989b2b4ba4a46e6f9c8342777a37ffb0ac0

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