Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4ea214134979cf…

MALICIOUS

PDF

74.5 KB Created: 2021-03-01 06:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 898dfc486df420d2e1b2514bfb2bbd6c SHA-1: 38c07f759994af4dca896ab8ea8a558a64ff6b8e SHA-256: ec4ea214134979cfafbd9c9ed372c2a413b8fedb1f0865994706757295adb67c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to a malicious website.

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 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://pelibifir.ru/award?keyword=how+to+multiply+square+roots+with+same+radicand PDF link annotation
    • http://reduslim-official.website/corel_wordperfect_x9_manualx6pjz.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/ritevawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_601b847e7d769.pdfIn PDF document text
    • http://shtancircul.site/99323121655ykwoe.pdfIn PDF document text
    • http://evilcheats.fun/27271960661emfmh.pdfIn PDF document text
    • http://firstsecu-paypal.com/is_digital_marketing_in_demandg73mn.pdfIn PDF document text
    • http://onlyforyou.space/cognitive_psychology_ulric_neissers1q26.pdfIn PDF document text
    • https://jesugenug.weebly.com/uploads/1/3/1/4/131406432/3405506.pdfIn PDF document text
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/lasavogin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_601888633c8d6.pdfIn PDF document text
    • http://ital-girl.space/eve_online_ship_3d_modelsy4vy9.pdfIn PDF document text
    • http://golomashvanna.xyz/make_money_app_androidk2okl.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/kumixezilobefosazalu4kjaa.pdfIn PDF document text
    • https://suxutusebosogu.weebly.com/uploads/1/3/1/3/131379987/jojupe_weginutama_rewugupokede.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/lowebemuwojiso/togunik.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/god_of_war_android_game_mob._org.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/review_label_makers.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/antenatal_care_services.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/65531575143.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_off0000e6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 5596 bytes
SHA-256: a249b144ca3bc3a786f60c6d685299c2b65953ccc89f03ea4b50db34d264f93b
font_01_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 10176 bytes
SHA-256: 0a8fd34682b80e7dc45f7c9305f81b517a7f38892b71076a2d8c43e60ebc79c2

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