Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f00d8d4655a8c12…

MALICIOUS

PDF

74.7 KB Created: 2021-02-15 16:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cc61039017215cf5d32642d8639e47e8 SHA-1: 36753adacfcb64b6c31fad98dc9c0661b71d559a SHA-256: 9f00d8d4655a8c12320a99287ae4cead34e6691789fc7d50af405b48b46e9ea6
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm hosted on disposable domains, suggesting a malicious intent to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this, indicating the file is designed to facilitate phishing or distribute malware. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic strongly suggest a phishing or malicious redirection attack pattern.

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://maypoin.ru/wix?keyword=ffxiv+crafting+rotation PDF link annotation
    • https://cdn.sqhk.co/savunowudob/gv23Aiz/60622806747.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/icheBkz/rap_instrumentals_download_gh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459921/normal_5febc2ca21936.pdfIn PDF document text
    • http://dugules.iblogger.org/37490259072.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/how_to_maps_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/igPHqjd/land_rover_defender_90_for_sale_craigslist.pdfIn PDF document text
    • http://bepebeku.22web.org/3324178212.pdfIn PDF document text
    • https://cdn.sqhk.co/marunenoxak/jGVhhEk/crystal_puzzle_3d_apple.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/bupaxomu/78278650683.pdfIn PDF document text
    • http://kosidigipetuvu.epizy.com/dadigelumo.pdfIn PDF document text
    • http://vigakike.rf.gd/chspe_study_guide_math.pdfIn PDF document text
    • http://kepisuv.epizy.com/meme_generator_free_apk_ios.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_off0000e8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FC 4920 bytes
SHA-256: c1b6f08050ea4c5d2281ea7d54c345875b4c76a1d7334f17935291538c695a20
font_01_sfnt_off0000f9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DD 10592 bytes
SHA-256: 7b04fcabca3fae2d1a250fd92eec32050ad763758a9de993b81e610501ca118a

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