Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e01d3afd3aa9085…

MALICIOUS

PDF

67.2 KB Created: 2021-02-09 20:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e0f62bf697d769a7b2b8044c245f9594 SHA-1: fa7cd9147b380987fa7fe83d6c0638598abcee76 SHA-256: 2e01d3afd3aa9085bc91374855ee92e05ced3a52759d1dadf18cd662f152aef2
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a phishing lure designed to redirect users to malicious sites.

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 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://leonvi.ru/aws?utm_term=game+blitzkrieg+1+full PDF link annotation
    • https://cdn.sqhk.co/rifusofuwedi/shdUz1T/89068781116.pdfIn PDF document text
    • http://meetsalle.xyz/abhimanyu_bengali_movie_video_song3ru8o.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/IhbjeJM/hitstick_rebirth_apk.pdfIn PDF document text
    • https://kominalekawer.weebly.com/uploads/1/3/1/6/131636772/8133718.pdfIn PDF document text
    • http://hookup671.site/16620551165ir9w8.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/QifjaaF/60868481923.pdfIn PDF document text
    • http://smeshnoykir.space/basketball_buzzer_sound_effectyn8mv.pdfIn PDF document text
    • https://siganagimub.weebly.com/uploads/1/3/2/6/132683357/40a7958ff0b96a.pdfIn PDF document text
    • http://samo-katim.ru/group_discussion_topics_2018_with_answersjvmen.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/mozedijiz/22491393331.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/aloha_browser_apk_android.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_off0000cba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 5248 bytes
SHA-256: 0719ca759f5d6de030561b4123a0b2fcce5b8de0b4b4c1abc4362fcd71bf262d
font_01_sfnt_off0000dd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 10348 bytes
SHA-256: 27c24a7e6988233fbd3c05a61b944ea484380dd6f18e7f987a5511fe75d3b47a

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