Malicious PDF — malware analysis report

Static analysis result for SHA-256 8873ff73b6f6f5a4…

MALICIOUS

PDF

71.6 KB Created: 2021-01-14 01:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ed17ba7a914a0e7b20326166924a2d24 SHA-1: 2a5feeb481bd9e01160d6dad4734000ab0814fe0 SHA-256: 8873ff73b6f6f5a4a2d08a36389c418996696cf7722558de21d1932ab927b941
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the presence of the external URI and the malware detection strongly suggest a malicious intent.

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/aws?utm_term=cara++gta+v+asli+di+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443326/normal_5fc9d62dc76f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5ffed22d4f48b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_5fb4f25ad807f.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/hecghtH/gymshark_simulator_roblox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369487/normal_5fcbfab24d2d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8c039777a5c.pdfIn PDF document text
    • https://site-1168081.mozfiles.com/files/1168081/knowledge_is_power_know_your_meme.pdfIn PDF document text
    • https://site-1175385.mozfiles.com/files/1175385/toy_blast_ios_hack_cydia.pdfIn PDF document text
    • https://site-1171990.mozfiles.com/files/1171990/snapping_turtle_baby_size.pdfIn PDF document text
    • https://site-1175393.mozfiles.com/files/1175393/8707357856.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/chfjPue/classic_cartoon_sound_effects_mp3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446286/normal_5fc4e060b279d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fec72d5dc3c2.pdfIn PDF document text
    • https://site-1177067.mozfiles.com/files/1177067/vuvobozujinosakagapofizis.pdfIn PDF document text
    • https://site-1166082.mozfiles.com/files/1166082/wajixulukojaged.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/pazifetanegapu/epidemiologia_del_cancer_de_mama_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/12478707219.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_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 4960 bytes
SHA-256: c47ba53f747d890286e070abf221ad2c9d2b86b4ba8f345b22b52ee46fd9d13f
font_01_sfnt_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 11424 bytes
SHA-256: a7eb225880b355a3ae7f3d66ad614e63ad7e9678057c32bf45753d4a90653b9d

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