Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a10c1af07f3519…

MALICIOUS

PDF

77.9 KB Created: 2021-01-27 09:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f93502467ea3d4542481651005beb7f8 SHA-1: 77eadbba24cb5469355db783f0a6341de77c054f SHA-256: 10a10c1af07f351972da11f4d39f8c29a786475b2a7cafe99fea9f3330682e3f
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create fake web pages or documents. The presence of numerous other suspicious URLs further supports the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/wb?keyword=arcade1up%20nba%20jam PDF link annotation
    • http://gufutaca3.xyz/comparative_adjectives_worksheet065zk.pdfIn PDF document text
    • http://molotkov.site/argentina_world_cup_1990_squad2l80m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_60044f850ca2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379984/normal_5fccebaec56b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417659/normal_60008e31d5a7e.pdfIn PDF document text
    • http://igonlinesupport.com/44514126201si9kj.pdfIn PDF document text
    • http://quinzsy-studio.design/kaguya_sama_op_sheet_musicrzpoz.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/42878866360qd923.pdfIn PDF document text
    • http://vash-fasad.live/injustice_gods_among_us_ultimate_edition_extra_characterskd02w.pdfIn PDF document text
    • http://madamzero.com/fancy_pants_man_3_unblockedzzy0s.pdfIn PDF document text
    • http://supfitket.buzz/super_suit_line_from_incrediblesoeri6.pdfIn PDF document text
    • http://top-odejda.com/quran_pak_in_english_download3482o.pdfIn PDF document text
    • http://haifaiv.ru/90117791871vi1zq.pdfIn PDF document text
    • http://slimitalia.space/world_cruising_routes_20180niwy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484623/normal_5ff69b0795a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450354/normal_5fd942c9e3e09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386618/normal_6005494d077d6.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_off0000e81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 4908 bytes
SHA-256: 2aedfb1df8e2e5f131c6530254667dc9a8d6eff8823972d31e4d18619816c724
font_01_sfnt_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 10624 bytes
SHA-256: 9eea3e4c7392b117e1638600fabaf66f800c1744e13994f2a12430465cc288ca
font_02_sfnt_off00011cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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