Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e42d851cdd4514…

MALICIOUS

PDF

68.3 KB Created: 2020-11-13 16:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 536ebcf5bf81daf3571fc96dee113260 SHA-1: 2440ea6c9ea28db6fe423ee9c7e6d7c9c7e86f96 SHA-256: 97e42d851cdd4514b0f4454c8156c44adf3a59f770cb0a36e546e1065891d462
162 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, suggests a lure related to a 'car bill of sale texas pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gettraff.ru/aws?utm_term=car+bill+of+sale+texas+pdf In 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/mivokozibu/vonomokemaxobitukijewuv.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/1896196276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a05d8d-6ebc-446c-9a86-439bbb03ff27/baylor_school_of_music_scholarships.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/mefaralobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf34d424-48e8-4a44-bac6-98597485c940/voxidazu.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/fapusifivexoliruwuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3dbee32-3a47-428b-8faa-cd4e98da715a/five_love_language_test.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/58238397178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c7db51-dd35-4400-abda-e033773b1947/cub_scout_wolf_handbook_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/free_printable_preschool_alphabet_handwriting_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42db55cd-a291-4fdc-9f03-8a3d46105c60/37537326525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcd0fb8-c1d0-4cb2-9584-3b7209ca98ff/70156578271.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/mevekajexogukalid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aac89e6-d1ff-4479-a5b3-bb0c055f6e76/zejakosolutilinisapozaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/27641067622.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_off0000c306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC306 4948 bytes
SHA-256: 233137ed6146ccf43f811b085d6db4f8f3b9af598ece849fafd6f4028a113d5b
font_01_sfnt_off0000d3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EF 10064 bytes
SHA-256: 9e0995a10e4a69d5ac84fe4bb3aabb4bf7eac7f398d60d9200b51a6eaa74fc64
font_02_sfnt_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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