Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b097379a879ecd4…

MALICIOUS

PDF

80.1 KB Created: 2021-01-14 21:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 51b5972081da970d54525df0bbc59a01 SHA-1: c0da3e9472fe576c4145d787273c7ba7d10bbee4 SHA-256: 9b097379a879ecd47eeb92ad9f26c7d719496a8a0e4181fa570c031bb8ff4248
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://trafftec.ru/123?utm_term=all+guitar+chords+chart', which is likely part of the phishing lure. The document body, though heavily obfuscated, suggests a theme related to guitar chords, aligning with the URL's UTM parameter.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=all+guitar+chords+chart PDF link annotation
    • https://site-1171689.mozfiles.com/files/1171689/kifopipuxebojinidakasawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470223/normal_5fa3cc5a12cee.pdfIn PDF document text
    • https://site-1177498.mozfiles.com/files/1177498/favivajobivufofin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5fd957c98ddaa.pdfIn PDF document text
    • https://site-1172743.mozfiles.com/files/1172743/75339907679.pdfIn PDF document text
    • https://site-1173136.mozfiles.com/files/1173136/acrobat_reader_gratis_italiano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412908/normal_5fb293ae74790.pdfIn PDF document text
    • https://site-1174052.mozfiles.com/files/1174052/96094544032.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://s3.amazonaws.com/pazatuv/untitled_goose_game_speedrun_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/karejibixivivero.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/80472879075.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bow_legs_correction_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/example_of_acknowledgement_for_practical_training_report.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C5 4848 bytes
SHA-256: df995ee514ae72f660104d57458e6e39991ac4bf88daf09fed30fbdd4ccec799
font_01_sfnt_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 10832 bytes
SHA-256: f7ece3fca1ba4d87588fc3266bd4ff72c54ad8a3817f6ef684bc789a52020dc7
font_03_sfnt_off00010fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE5 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d
font_04_sfnt_off000124e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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