Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6068139bcf8c6f…

MALICIOUS

PDF

112.6 KB Created: 2021-04-08 08:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 113573741de973689ad3723bed04b0ae SHA-1: 40376c9966b23dab4d3fd62f9640fc8f42c7884d SHA-256: ea6068139bcf8c6ff6c29d33db72cf37792476a5bec310b11c6438f98823534c
156 Risk Score

Malware Insights

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

The PDF document contains a lure related to hacking the game 'Yugioh Duel Links' and embeds an external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=how+to+hack+yugioh+duel+links
    • https://cdn-cms.f-static.net/uploads/4374379/normal_602dae81f303f.pdf
    • https://cdn-cms.f-static.net/uploads/4475985/normal_6064adb31929d.pdf
    • https://cdn-cms.f-static.net/uploads/4478398/normal_600b5905166f9.pdf
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5ffe5163551fa.pdf
    • https://cdn-cms.f-static.net/uploads/4369905/normal_603566ae350de.pdf
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5fe876c149f80.pdf
    • http://lasabobobatir.22web.org/97157262821.pdf
    • http://rutonujak.iblogger.org/spoken_english_conversation_mp3_audio_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4468814/normal_6043f4091efca.pdf
    • https://cdn-cms.f-static.net/uploads/4504641/normal_603a08375c3ea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b4e07287-86f3-43dc-9409-9bd7a0c61558/mini_gs_barrel_size.pdf
    • https://uploads.strikinglycdn.com/files/35648f5d-2568-469f-a811-01423d8efdec/lepuxezukafugakamon.pdf
    • http://denuvila.rf.gd/wojemurikideli.pdf
    • https://uploads.strikinglycdn.com/files/09694759-0d9a-4035-b63c-4b7061d948d3/59792876277.pdf
    • https://uploads.strikinglycdn.com/files/155720da-2f13-4ed5-807c-ead46da18fa2/what_are_the_four_rules_of_exponents.pdf
    • https://uploads.strikinglycdn.com/files/33dd4158-7726-46cb-9ae0-6eafde9e0376/34958386812.pdf
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_a02a2e4ad54548218eccee49598e3a29.pdf?index=true
    • http://tiladolukix.rf.gd/whirlpool_stackable_washer_dryer_error_codes.pdf
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_258b79c65f4144e49f251887009ab8cd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4b8fb298-67c7-4ac1-8458-390d97cedc98/99072683940.pdf
    • https://uploads.strikinglycdn.com/files/a1a14c75-c9bc-4bf8-8c6a-314fd685c9a1/mukuzar.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001677c.bin
84d5776ee8e75f6c236ab6507786b3d4151c5c4c02a96feaadbe27384d3f5323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1677C 3872 bytes
font_01_sfnt_off00017532.bin
b27acbf611a0d2a311ad9e246ac82f706e99e1d489e948573dc7b46fec42c834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17532 5324 bytes
font_02_sfnt_off00018768.bin
d1a095d98293f3cefb42457db59e7a6d74571f3b1de3a2f1432fc33fed9d489d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18768 15448 bytes

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