Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e3b2a8d5961442…

MALICIOUS

PDF

68.8 KB Created: 2021-02-07 14:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 91e64747d43522ef53a3cab4721f0423 SHA-1: 8089c214082cf354caae61ae0c0fe5bdc4667103 SHA-256: e0e3b2a8d596144297df6c9f96609d6d530869239c4b84e18f36699bb67c44aa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

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://baarspo.ru/123?utm_term=stages+of+river+development PDF link annotation
    • http://avto-document.site/kemajojeporuwpgi.pdfIn PDF document text
    • http://connexion-amelii.xyz/setisikufowiganlq965.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/cdbmhig/73272796341.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/EiRjajh/22367620022.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/KjdLVja/smash_car_toy_car_driving_simulator_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_601231db073e3.pdfIn PDF document text
    • http://raisinslabs.club/57281450283k98nx.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/hbajfje/17852362864.pdfIn PDF document text
    • https://cdn.sqhk.co/vijamabaf/djjgjkV/setibulizuf.pdfIn PDF document text
    • http://wrinklestiltskin.com/266172268135r62y.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/ahhogf6/65603994540.pdfIn PDF document text
    • http://vinnipoh.space/ben_and_holly_colouringngbrm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fd7c30e55f23.pdfIn PDF document text
    • http://chaptejvxz.fun/download_aplikasi_hi-_q_mp3_voice_recorder_proryzq1.pdfIn PDF document text
    • https://cdn.sqhk.co/mubikidom/ciggiib/fusitojarawoxuxalubolos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457006/normal_5ffc2b1601f22.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/kevotev8xrxe.pdfIn PDF document text
    • http://tk-pobeda.site/pababotulirimijxnwem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF8 5524 bytes
SHA-256: cc5b753cd7b457dcc814c009b8c549619bef61e1cab40a33fb6a37ed83598409
font_01_sfnt_off0000e2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 10364 bytes
SHA-256: da2c949823d2fde684ef2b9a18785c60f95ff2019f76d9dd143e186dae23f0d4

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