Malicious PDF — malware analysis report

Static analysis result for SHA-256 547469f9cc1761d3…

MALICIOUS

PDF

83.4 KB Created: 2021-05-12 14:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fd8c5e44aef3e0d84561dc544262afd SHA-1: 20a1790d24aabbee7e87fec7a5ac3ba4e8aa1f78 SHA-256: 547469f9cc1761d3f173ae87a5a6e67a8cebc9db2876fe0069a3a2a74b58171a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of embedded URLs further supports the attack pattern of directing users to external resources, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=lasko+fan+tower+with+remote
    • https://cdn.sqhk.co/jivonaxadu/YJiigfk/thrifty_car_rental_denver_reviews.pdf
    • https://cdn.sqhk.co/posukomokufi/ftChcLT/67507199315.pdf
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/4820734.pdf
    • https://cdn.sqhk.co/jesisuvov/chihiGJ/abba_greatest_hits_vol_1.pdf
    • https://perelixaji.weebly.com/uploads/1/3/4/8/134881923/24234ba977bbd0a.pdf
    • https://xuwulusepe.weebly.com/uploads/1/3/5/3/135310973/kedagaluwula-vidalazavu.pdf
    • https://cdn.sqhk.co/wizokawoxo/gfhijbe/73576306987.pdf
    • http://surevixa.22web.org/vadunarorenuni.pdf
    • https://cdn.sqhk.co/zogowefu/AhghiOV/detroit_police_car_drives_into_protesters.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sapojujemok.epizy.com/61713188032.pdf
    • http://xanunomoz.rf.gd/rijuwokobedutinedajez.pdf
    • http://sukidagijonola.rf.gd/63475377141.pdf
    • https://uploads.strikinglycdn.com/files/e40e1a76-fddb-42d3-bbea-5d09380249f4/tecnicas_e_instrumentos_de_recoleccion_de_datos_definicion.pdf
    • https://s3.amazonaws.com/putelekireza/85434899535.pdf
    • https://uploads.strikinglycdn.com/files/ed7af39b-941f-42e9-90f1-7f0c11052a4f/77829807745.pdf
    • http://supikovibamukip.epizy.com/aikido_filosofia_y_practica.pdf
    • http://gugivuma.rf.gd/26031229686.pdf
    • https://uploads.strikinglycdn.com/files/ece12911-90fe-4d48-b4c5-961a18718577/how_to_fix_tumble_dryer_not_heating.pdf
    • https://s3.amazonaws.com/bakoloj/sedimoworovej.pdf
    • https://s3.amazonaws.com/bokelur/tefotemupeledodabuf.pdf
    • https://s3.amazonaws.com/dekogamik/59665836271.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001089b.bin
c5823285e6250c48ead9ffdef1a442a2baaf67eb397805d742d0ac0af7f78e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089B 5072 bytes
font_01_sfnt_off000119cd.bin
e4c17f987fde38ad28b2b85ea51aa479a1e75bc1a2d2dd55f3f11698595a2aeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 10900 bytes

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