Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2186106454409f…

MALICIOUS

PDF

71.8 KB Created: 2021-02-24 05:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ed5ffc049e4b3cb1a518a9da04ab7c7e SHA-1: 193e29a8f7f2eca68bc90928df617e8ae298011a SHA-256: 8f2186106454409f4bc43095deccb53df94f284705a6b5eb0104527585767982
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded links, such as to 'seumenha.ru', likely serve as entry points to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=bissell+powerforce+helix+bagless+upright+vacuum+instructions PDF link annotation
    • https://finiluxib.weebly.com/uploads/1/3/5/3/135350298/ketosobigi.pdfIn PDF document text
    • https://pujonavow.weebly.com/uploads/1/3/5/9/135958036/cc96b7d2e2d4cfb.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/kemisulepirabel-rizerum-fukupax.pdfIn PDF document text
    • https://cdn.sqhk.co/tirewaku/ctgfbF0/sekopo.pdfIn PDF document text
    • https://jubekajaduv.weebly.com/uploads/1/3/4/3/134345699/df12611cb4d9.pdfIn PDF document text
    • https://zogudoweno.weebly.com/uploads/1/3/1/6/131637773/kugam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fe1fefb81d6f.pdfIn PDF document text
    • https://nefarixuk.weebly.com/uploads/1/3/1/4/131407944/2256576.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hYgdyhb/blacksmith_tools_from_undvik.pdfIn PDF document text
    • https://leruvipox.weebly.com/uploads/1/3/5/3/135347136/b54dbf485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_60146eaa5d5e9.pdfIn PDF document text
    • http://gaydating.world/weber_grill_natural_gas_regulatork02um.pdfIn PDF document text
    • http://feelslike35.com/95364536783p2j52.pdfIn PDF document text
    • http://barbanapoli.moscow/mewexamujotuxuv3fm.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/tufujifinobiro/57618891556.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/miui_camera_apk_xda.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/65323909021.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/genetics_basics_worksheet_1_answer_key.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_off0000d981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD981 5840 bytes
SHA-256: a41e38d298f4371bee1c569e63a7808f6154254ada92cf146674138b4c5e0bc8
font_01_sfnt_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 10544 bytes
SHA-256: 2506f31aab8f7946764402011581a71127b9a728e7cff4db0a023d599fa40c27

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