Malicious PDF — malware analysis report

Static analysis result for SHA-256 0617f5fdf484bb75…

MALICIOUS

PDF

78.5 KB Created: 2021-03-04 10:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 54db786dc99f76d818c658331c828a4f SHA-1: cc69e1ab78214efdbaa96f3b820bf93ba04e00f6 SHA-256: 0617f5fdf484bb75af55e77b1c393861ea97d889e8e237b2456c62210322d41d
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating a link farm with 30 external PDF links, suggesting a phishing or SEO manipulation tactic. One of the primary URLs, 'https://mezovuduw.ru/strik?utm_term=gabriel%2527s+inferno+part+2+summary', is directly associated with the malicious verdict and likely serves as the lure. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links point towards a malicious intent to redirect users to potentially harmful content.

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://mezovuduw.ru/strik?utm_term=gabriel%2527s+inferno+part+2+summary PDF link annotation
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/efc2c24178.pdfIn PDF document text
    • http://kotonopiz.iblogger.org/disciform_keratitis_zoster.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/dgijgi9/stickman_battle_fight.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/7FnCOjh/lumberwhack_defend_the_wild.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/70551166598.pdfIn PDF document text
    • http://palejep.22web.org/32153550465.pdfIn PDF document text
    • https://xigakoter.weebly.com/uploads/1/3/1/3/131379919/mamuzota.pdfIn PDF document text
    • http://nudikegavugo.22web.org/49571102604.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/1x4VcnV/didikemalezizubof.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/8B0Yhjj/112978952.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/ljeiiUf/create_stickers_for_whatsapp_stickerfactory.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/fadedosi/catholic_english_prayer.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/64138856771.pdfIn PDF document text
    • http://pukilosik.epizy.com/54142457306.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/gegasagapajade.pdfIn PDF document text
    • http://poruzimikipazan.epizy.com/58652716246.pdfIn PDF document text
    • http://rusuxagek.rf.gd/83130779747.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/65009632317.pdfIn PDF document text
    • http://kukadafimi.rf.gd/best_naruto_shippuden_game_for_android.pdfIn PDF document text
    • http://xalovizavana.rf.gd/mobile_website_template_size.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/afterlife_xylo_song.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_off0000f5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A8 5484 bytes
SHA-256: f028e6913b28e145552c58ff01ea04df3ac1fb08e8a1b7f3335b82fa52f0bf4c
font_01_sfnt_off00010848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 10684 bytes
SHA-256: 448c6051125e7f2d93275199a3736af1d603abc5471356ccb7b873963263a342

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