Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf46a2e492b7741…

MALICIOUS

PDF

70.0 KB Created: 2021-02-15 03:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17e730d7b2964c950a7a5a944de2b603 SHA-1: e03a3a1d137fa405a1d4adfa426295ee31f22bc1 SHA-256: caf46a2e492b774140b912bf914dda96dbfa42c659d7724fd9339888c4e4b687
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the structure and heuristics point towards the file acting as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/aws?utm_term=sheet+music+going+up+yonder PDF link annotation
    • http://shtangelkipokupkiitd.online/wibotanalokesopetarakonemq65o.pdfIn PDF document text
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/bipevugenaripul.pdfIn PDF document text
    • http://vvinorama.fun/80977627600zx9hy.pdfIn PDF document text
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/ff4dac.pdfIn PDF document text
    • https://jukusixod.weebly.com/uploads/1/3/1/4/131483076/juzewowafigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_601fb86a981f8.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/rixevozajixezos/19641725061.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/dazevofegezo.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/android_emulator_for_windows_10_development.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/vma_music_awards_2019_performances.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/38965539605.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/26449024476.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/mufimuzekimebodokurakol.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/bticino_door_entry_user_manual.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_off0000d50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50F 5448 bytes
SHA-256: e2de0ae3aec613d3441104e297e183fb91e74dc3f76f6eaaaca9138c3b8873dc
font_01_sfnt_off0000e778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE778 10444 bytes
SHA-256: a441cea18ada25eadc2b7bda3434a87154d08149144048ade8f59b604bf73b5f

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