Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b9e5e8ac0b0aa1…

MALICIOUS

PDF

79.1 KB Created: 2021-03-16 14:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1be7bd95b89affdbc0158a9178043946 SHA-1: 54af5bb2ab4d6e98575045bd7139967b81e18f63 SHA-256: a1b9e5e8ac0b0aa1808406590c154ee4cdc0d9642f27cb6e88fccc285465d98e
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though partially corrupted, contains text related to 'Aladdin game for pc full version', suggesting a lure to download potentially malicious content from the external URLs. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

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://pelibifir.ru/123?utm_term=aladdin+game+for+pc+full+version PDF link annotation
    • http://scriptbook.xyz/gw2_leatherworking_guide_400-_500lhs8n.pdfIn PDF document text
    • http://ygrash.website/melhores_aplicativos_agenda_androidt6rww.pdfIn PDF document text
    • http://nout-prodat.site/93376454733e7p8p.pdfIn PDF document text
    • http://businessoutsourcing.info/7478686494qh9pq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5fec6e2f1d3bd.pdfIn PDF document text
    • http://wafolifinibi.22web.org/rotixapusojatogevujum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426543/normal_6004510e1608a.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/historia_do_calvinismo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugoxovok.epizy.com/35198419536.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_8b76776eae0b4957b43b424ea679e174.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lumixi/roxam.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_41b833e50bb74ec98f379426e3192183.pdf?index=trueIn PDF document text
    • http://suvalomimo.atwebpages.com/how_to_get_bat_in_gta_5.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_5a6a6dd66f0c4922bf4bbd8f8dea935c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/zebubulufanifapovan.pdfIn PDF document text
    • http://fizefitelibulob.epizy.com/grade_4_comprehension_worksheets.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_36404450068042d3bcd143700c73f799.pdf?index=trueIn 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_off0000f63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 5524 bytes
SHA-256: 24260751233b4b6bdaca13b46692de4f06a9d5ecd9051e5c272356129ca3b607
font_01_sfnt_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 11100 bytes
SHA-256: a3191daaae87779f9ca5d8ebe7d92660592d6dbc2097ecc03d5d6a03c44ce776

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