Malicious PDF — malware analysis report

Static analysis result for SHA-256 2338a53e1919bd5b…

MALICIOUS

PDF

65.9 KB Created: 2021-02-27 12:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3c4f2495d1da799e40585e406a4d527a SHA-1: efbfc2b97d15acb7ef553e8b63b882712a0854b0 SHA-256: 2338a53e1919bd5b15afb8859e2a4989c6497ed54a372853e9cebabfe8a9881c
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect the user to malicious sites.

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://lozipotod.ru/123?utm_term=is+audacity+compatible+with+mac PDF link annotation
    • https://cdn.sqhk.co/tixukiko/GJieRhd/58701379787.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/jcaIjgf/your_guide_world_travel_tour_guides.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/jiojjPf/dajuwazuberofoj.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/PjfLjbt/holographic_smiley_glasses_review.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/samsung_grand_prime_motherboard_price_in_india.pdfIn PDF document text
    • https://tawuzipufuk.weebly.com/uploads/1/3/4/7/134707118/muremununinase.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/dhijeig/avatar_girl_dress_up_games.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/h2gjuol/2020_presidential_ballot_sample_michigan.pdfIn PDF document text
    • https://cdn.sqhk.co/webuposiba/bhhAiiJ/vulimafogupexomeguve.pdfIn PDF document text
    • https://pomaxobizo.weebly.com/uploads/1/3/1/1/131163853/fukaxovat_risesewobonel_sixawepuw.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/tkjbioT/mobile_legends_bang_bang_diamonds_email.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/dx4hggi/65300216360.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/xezonijida/20637264324.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/vutonugikalen.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/68661672961.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/les_alphas_en_7_jours.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_off0000c646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC646 5488 bytes
SHA-256: e631f1d919ac0a14ee516adacca73d7485ac939be8e15b3fed2a1e72fa8d587b
font_01_sfnt_off0000d8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DE 9940 bytes
SHA-256: 8b5ebcc46d3d8755939201e5935cec35070cb133319a7351951ce30e9a95d015

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