Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc5a42eb2272d7e…

MALICIOUS

PDF

66.1 KB Created: 2020-11-20 21:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5cbe86481bcb7e570f037c961a12dda SHA-1: 57e63191de03e43ce52a88586108a3070ecea94f SHA-256: ccc5a42eb2272d7e529b5db64b5ede24d112387b14e21f5999156ea4675154d0
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, trafftec.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'library map'. No scripts were extracted, but the presence of the external URI is the primary indicator of compromise.

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=usf+shimberg+library+map PDF link annotation
    • 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/sugosubexez/21796492150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/449ef5ea-e1fb-4733-ab69-e4650b730efd/nasewavamoloz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc42ec87-5826-4776-b07e-e6b33c1bbaec/ritusasakefelunajijiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de926cf-ecfb-48d0-9b7b-8fe17eafa82b/jufetevotoze.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/sda_pathfinder_master_guide_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f9c8fcc-ec88-4234-9b53-eb79fe10ffb0/87251733474.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/casio_fx-_82au_plus_ii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/takegepizozi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/87088509627.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/thermal_energy_temperature_and_heat_worksheet_lesson_1_answer_key.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_off0000b979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB979 5040 bytes
SHA-256: ea916d868798d629337f4ab35c359ae13663ebd6873fe3fc7ed53901f7c1d390
font_01_sfnt_off0000ca96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA96 10320 bytes
SHA-256: f11f87003cba5f25671e82f3ea02226256bd16f210eb265ecfcc12c81f0ba062
font_02_sfnt_off0000ede9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f