Malicious PDF — malware analysis report

Static analysis result for SHA-256 113ff02a4adb7207…

MALICIOUS

PDF

88.1 KB Created: 2021-01-06 10:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ab84d752ba4114d2b2ef78e8bb58217b SHA-1: 8aa2ad18f77794dbe6c4040d49d83c2cbfbe902d SHA-256: 113ff02a4adb72073643dd9ad6a473acc04a740d1323ab1f685027c19af82595
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of the attack chain. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/aws?utm_term=chemical+equilibrium+class+11+notes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455642/normal_5fd92bc5e15c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_5fb9a65ac5547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_5fd97d0393b95.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/geBgjhl/br_style_apk_para_hilesi_indir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487903/normal_5fb9d7edef1fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f90fbc6a5f52.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/FscRjdl/media_markt_jochen_schweizer_gutschein.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414161/normal_5fedaa825a1df.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
    • https://uploads.strikinglycdn.com/files/d1614d51-c474-4989-95da-0df60161c065/kutiriberogirewik.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/background_designs_for_ppt_slides_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/wesoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70112e19-0829-47d0-ac11-8c8cb5895eea/fifivabefukomoguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f146e78-8da1-47e1-a7c4-7663c54248b0/43301049968.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/lagu_terdiam_sepi_nazia_marwiana_planetlagu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 5620 bytes
SHA-256: a74a47940afa39b6cd02386655f27f1b3f35c785cb3d15171b46d77e650090d6
font_01_sfnt_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 11260 bytes
SHA-256: 711d04b01f4f26820129b626436506f1660c0e5db8175a0ac7816866f4086256
font_02_sfnt_off00012f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6E 16184 bytes
SHA-256: b7db009a30868398dcde78d42b4428d415b59c7dfbf0da11ee5f73204ba52583
font_03_sfnt_off00014490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14490 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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