Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da70dd63e31f83d…

MALICIOUS

PDF

69.7 KB Created: 2021-02-28 00:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7b4683d4a48bdfdb131ccef0d51ac1dd SHA-1: 29602e14c7b529242206e64cb4c89201da97a06b SHA-256: 9da70dd63e31f83d469254d4fb8719d1b1d54eff1dc31596aa2b909a064efb83
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'baarspo.ru', suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics (link farm on disposable hosting) strongly indicate a phishing or malware distribution scheme.

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 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://baarspo.ru/award?keyword=necromunda+underhive+wars+walkthrough PDF link annotation
    • https://cdn.sqhk.co/wejewenu/jhhiifY/use_assistive_touch_to_turn_off_ipad.pdfIn PDF document text
    • http://immortal-sho.club/international_gaap_2017_free_downloadvojf7.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/xijiwogewopa-semiwexo-nulerez-datajetinage.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/hiihhh6/birthday_cake_ideas_design.pdfIn PDF document text
    • http://dostafood.xyz/57754204025qkb0t.pdfIn PDF document text
    • https://kezeminitiwo.weebly.com/uploads/1/3/4/4/134476020/ba9ee7f4.pdfIn PDF document text
    • https://jovimujokuva.weebly.com/uploads/1/3/2/6/132695493/5177bf267916.pdfIn PDF document text
    • http://antinomi.design/stylish_fonts_app_for_android5x46n.pdfIn PDF document text
    • http://mx50off.info/xebikojidawelapar2he13.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/pejovowemerem_waweguke_wasotiragobeb_vawokaxibunovu.pdfIn PDF document text
    • http://kushtanash.ru/return_of_the_black_queenaz1p4.pdfIn PDF document text
    • http://shoop-fp.ru/7634608616barne.pdfIn PDF document text
    • http://hellesypakk.online/regifabuligopoxuimod1.pdfIn PDF document text
    • http://aduo5.online/kizugezeronatofitemqqy3.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/mgeibgc/92869682808.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/expedition_to_castle_ravenloft_download8tf65.pdfIn PDF document text
    • http://forsage.pw/kafopetosudusv4km.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/julaxel/rowexaniromotasovufebix.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_off0000d283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 5540 bytes
SHA-256: 78a3a59e2ab7f690e72b55e9302ef4a779439065c8cede4429de0750de261da6
font_01_sfnt_off0000e53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53F 10920 bytes
SHA-256: 3edc1670fc3be0d1d6cf283dda3761b9ffb5c70c0a3d3a75654fb8e0f7d295ab

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