Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d1af3122e00e10…

MALICIOUS

PDF

99.0 KB Created: 2020-12-06 16:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 533e6e8a59facdf72fc913b27c71d9a9 SHA-1: 6c650e981b943f554a53bcbea28ce2c0c306f7fd SHA-256: 26d1af3122e00e10dbc868824e6f706704fe87964fdb9d289939a1c60d4f3d43
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'traffine.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'self esteem building worksheets pdf', indicating a social engineering attempt to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=self+esteem+building+worksheets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469623/normal_5fb9d2a3a8faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5f9e8d69c1de9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed17f7cf8c75402b0ccf/t/5fc25f8518e72e5fdb248f72/1606573958254/13594363880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c41054-7134-4858-a266-5d2657b1d226/27638785169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f09970f-968b-4e54-86fc-93352d7cfa73/28943398872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6954654-a84b-40d6-ae0a-cde018d535a4/hello_neighbor_hello_bendy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d913cee-6efc-4bdc-97d8-90c89f96b53f/7659718772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bece4864-70b0-428c-8b08-bf38f61ef296/wujipidetepudunavojave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec69c748-dbf8-4aa7-89ac-1c734efbc2ae/45047348925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ce4e0b-2aa8-4435-bccc-06d141b52d2e/65710733892.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144a93398ff7515307f21/t/5fc3d5343485235c863bf9de/1606669621789/pa_hunting_season_calendar_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa63ec31-4648-4a60-bf6b-cfd3ecbe0b85/vewogepuxojilupakoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a89588-45f6-41ea-a491-a69fe6ec43cd/5349807675.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14650 5644 bytes
SHA-256: f1e7c8b506736b91c4aaf9c233dd1a00744d4b9d2e67111615982b60b62f9b1a
font_01_sfnt_off00015965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15965 11308 bytes
SHA-256: 68a85857e0dd254b08d812c86eb5288e4846b3ae009a7e17ae1051b9b0049d7a

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