Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2dddaf007bdfd93…

MALICIOUS

PDF

80.1 KB Created: 2021-02-27 18:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: daf4bf6f5027fcbe73c827f249b0bc7d SHA-1: d42adce428348e6d9be7c3210a8ce7c5ab503603 SHA-256: c2dddaf007bdfd93f73db782e37ab57d1a3ce77b512255c8df7e7fe479fc49e7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=lenovo+t510+memory+upgrade+16gb PDF link annotation
    • https://cdn.sqhk.co/kurafuso/j02O9ig/inside_out_joy_crying.pdfIn PDF document text
    • http://am-sound.ru/glitch_2_torrent_mac01jp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461249/normal_602301a1b7537.pdfIn PDF document text
    • http://hookup153.space/jidapusaw6ynty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_600a5269529ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_6018029a038e6.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/autgiXV/57080113263.pdfIn PDF document text
    • http://italywom.space/el_sociodramaebvvr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5ff1e2de8e7c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384152/normal_5feff6ba9ef6a.pdfIn PDF document text
    • http://raisinslabs.club/i_dont_care_official_video__ed_sheeran__justin_bieber_lyric6ym1i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_600cb9f8ae5bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5fd31400847ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410731/normal_5ff2043b56949.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480735/normal_5fefe47e18ae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_602706bb6c656.pdfIn PDF document text
    • http://50offit.pro/xexigarime46gl7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447647/normal_5ff4fed017d93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474736/normal_6003b75f8d2d3.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/ZXihhd2/16209069471.pdfIn PDF document text
    • https://cdn.sqhk.co/kurazagizub/JjhqFBq/retro_bowl_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7C 5616 bytes
SHA-256: 8a09f8d53873f73bdab0900bf6153e4865d07ee1e28cf55734cd69986b1cdd25
font_01_sfnt_off0000fd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD81 11464 bytes
SHA-256: d840e8ce0c9fa01d5be0795136ccd9e0e15b992b408598ef8470ae7ea6af0670
font_02_sfnt_off000124ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CA 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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