Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1ae5a000ce9539…

MALICIOUS

PDF

68.8 KB Created: 2020-12-29 13:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bdda705dac9b1a6b8272402b0778eb52 SHA-1: 185b64077ef23ce7011843f188408b68eca6e838 SHA-256: 2c1ae5a000ce953914e3930eec2f16ec34682632dabd5f1d84e46951a26a2a2c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafffi.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://trafffi.ru/123?utm_term=costa+level+2+questions+examples PDF link annotation
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/409554fbf44382.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/Jgj8ED5/v_fly_mod_apk_download.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/lonofutopibuxosejime.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/hgnhg58/folukedavuponiku.pdfIn PDF document text
    • https://cdn.sqhk.co/xetajikok/yhbgGhE/gevojinixojepo.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/jolozidabi/horse_boarding_business_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bec1f8f-bf27-4621-a083-07ce1f07e526/taxumupozesutegibogegupal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3f66b2-fa19-494a-bffc-19b8dce53d26/48634867310.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/mefeg.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/wow_leveling_guide_3.3_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e9e9c7-edc1-47cb-bbb5-70bb41d35930/copper_2_sulfide_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3fca3b-0daa-47aa-bcb4-80ab7ea8fae4/14571614215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5427ba0d-d1dc-4bcb-98a8-a5ac24d0592b/willing_slaves_of_capital.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC582 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000cfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC5 5160 bytes
SHA-256: 8c54950eb9366151fa44a408c050fbb14d51e4d4c16caf96e65060da0b54eada
font_02_sfnt_off0000e150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE150 10356 bytes
SHA-256: ef4bb51f5613b32cfe3bc977d3ea210baf43db5568c37e8a6bbf7dcd49a65270

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