Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b5194baf600540…

MALICIOUS

PDF

85.9 KB Created: 2021-03-19 17:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a11cb09b49b5bb960c07ed5693f76db5 SHA-1: f1b26e1b276b329e6b313e3bc495c0aabfa616f5 SHA-256: 68b5194baf600540abfc1385c6840221fa7c4546ccaadffff2bc4d09ab6275fc
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/123?utm_term=sql+server+2008+r2++utorrent PDF link annotation
    • https://cdn.sqhk.co/fisoxinizo/eheLD4S/lusopom.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/rggIhcd/majixipamabajipejatef.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/SogghgW/2048_pokemon_mega_8x8.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/cidIhaL/yellow_cosmos_flower_tattoo.pdfIn PDF document text
    • https://cdn.sqhk.co/terisuzuji/hjasgih/prank_call_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/RPDjeif/99547496809.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/ohbAXlH/9903954420.pdfIn PDF document text
    • https://ribovaboj.weebly.com/uploads/1/3/0/7/130775049/jojejejuve_jaxosis_negepubogilab.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/icibXgc/cat_jump_starter_cj3000.pdfIn PDF document text
    • https://kajagopop.weebly.com/uploads/1/3/4/7/134729443/bisejemixosume-kinonom-kiberumifu-lofatabuvedo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://libevomupukado.rf.gd/91329050453.pdfIn PDF document text
    • http://supabije.rf.gd/93685789769.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/ms_excel_vlookup_example.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/futanig.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/kings_quest_chapter_4_trophy_guide.pdfIn PDF document text
    • http://jududupozibuj.rf.gd/74183220008.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/12037720035.pdfIn PDF document text
    • http://tubulufegufixo.rf.gd/62012326933.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/arena_simulation_project.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/freeport_texas_tide_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/zapode.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 5228 bytes
SHA-256: a82fdadadd534adffca5483a32077bae37dc2377d1350d2463d6dccb4ce0bcf2
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 15760 bytes
SHA-256: 287667e7ac9807c3b615977abcf437d852619fd97af03785d7ded759554ad0c4
font_02_sfnt_off0001332b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332B 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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