Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab36fd2b2f8c34d9…

MALICIOUS

PDF

66.8 KB Created: 2020-12-24 19:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 49fd14106ed3a8ca794b66774d248290 SHA-1: 7330e45e595dc499a52b80a988596ab0925a1863 SHA-256: ab36fd2b2f8c34d961bf979475cbdbfa358ee47cd8a819a0a226d52fb6298f04
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm its malicious nature. While no scripts were explicitly extracted, the presence of numerous external links indicates an attempt to redirect the user to potentially malicious websites, likely for credential harvesting or malware distribution.

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://traffine.ru/strik?utm_term=nova+launcher+tv+box+4pda PDF link annotation
    • https://cdn.sqhk.co/purovufizu/idvihBX/dotafulibem.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/YggRONy/nail_art_designs_memorial_day.pdfIn PDF document text
    • https://lemevepavakupe.weebly.com/uploads/1/3/4/7/134701524/1017846.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/bSZrEjd/terraforming_mars_expansions_review.pdfIn PDF document text
    • https://fenogelojana.weebly.com/uploads/1/3/4/9/134904444/5803188.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/faduxodiwo/lugupur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32fe0e42-7888-4373-989a-e446685e6db9/89488805666.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/sojotozutupefutezefa.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/66643305324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2455ee98-bc89-40e3-a80d-267d1718ed44/royal_farms_apartments.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/peninsula_anatolia_mapa_asia.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_off0000c7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B2 5308 bytes
SHA-256: e3ee43ac7ce10c61a3e65918b74c02136313f199520e263b569266cffc472dc9
font_01_sfnt_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 10908 bytes
SHA-256: 57cfafd62d3a468b7e90d2e086bff2235e1c3fb3d6c353205eaa89989d5d6ccf