Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4c75b1f6f397a9…

MALICIOUS

PDF

79.3 KB Created: 2021-04-08 10:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 057bda775afcb170aab7072f1c102364 SHA-1: 23f561346d3d16c95631f25e0268bc468b7dbd8a SHA-256: 1c4c75b1f6f397a92d642fd0f9fc01a8b1cffdcec8eba8193e4a4d7e7064cce6
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. It contains numerous embedded URLs, with one prominent URL pointing to 'fokemale.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the lure aspect. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://fokemale.ru/strik?utm_term=infinix+note+7+lite+price+in+nigeria+slot PDF link annotation
    • http://my-favshope.online/jemejomajiginukiputaneromvh3ez.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/ficihhd/dunaxivokoki.pdfIn PDF document text
    • https://cdn.sqhk.co/tezesafura/yijgirb/bibedosarisutavoxa.pdfIn PDF document text
    • http://dreabling.online/fulltone_ocd_overdrive_v2_review4fsw6.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/star_wars_mandalorian_ahsoka_tano.pdfIn PDF document text
    • http://power-guard.shop/xagedotunigufutik29mhn.pdfIn PDF document text
    • http://datingdate.site/56294485846pkwsr.pdfIn PDF document text
    • http://hesap-al-sat.com/dish_network_contact_phone_numberzm204.pdfIn PDF document text
    • http://saniwofixapu.mygamesonline.org/que_es_cateter_venoso_central.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/blhiibY/86015041090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14f8507-265b-48a2-863d-b215d0411e7c/lawegito.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/34776214743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fe312e-4cac-4f73-a28b-1e26120eef10/nowozaravu.pdfIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_e27faccf0d334ee48ffbc96cdcf5a066.pdf?index=trueIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_4226f0351d6b480dbd528734f5cce2d5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ab5d72-2325-4bdf-a8a1-c3bd49e29564/dajapesota.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_35373ab550454816ac0736964605d716.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6f45d2-d1b1-4df4-8e14-ce564a7db436/subexidugenomuzuf.pdfIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_4d9e577e36aa4614a89a5262cb84d5a3.pdf?index=trueIn 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_off0000f8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 5268 bytes
SHA-256: 76646638c05b07b50207ee9629bccf81544425ef22a75ad65391d150a85b12fb
font_01_sfnt_off00010b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 10904 bytes
SHA-256: 7b33b11d00cb414f9ff1ef86e4bcc8b32fb4c4c7d7e7d6b5e0e39e7530dd4723

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