Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c496377310ac72…

MALICIOUS

PDF

528.9 KB Created: 2020-11-10 02:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 92a9c511c5028a8aa658aed1674466af SHA-1: 2296a2ba572a4ea141df2e8fad30d04e5db533f9 SHA-256: f1c496377310ac728d43e281838ce8aa5a0d4e4f2ef9dec73470421aa6645d1f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to serve malicious content or redirect the user. The document body, though heavily obfuscated, suggests a lure related to a popular book title, aligning with phishing or social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8868

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://trafficel.ru/123?keyword=magnus+chase+hammer+of+thor+free+pdf PDF link annotation
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/wakasovowi.pdfIn PDF document text
    • https://kikurizup.weebly.com/uploads/1/3/4/6/134694954/7030804.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/menuzelawu.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/7671448.pdfIn PDF document text
    • https://gubetixe.weebly.com/uploads/1/3/4/3/134314982/sinomasavek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/16206e18-9401-4b99-9de6-e28884e20542/xonatunexamil.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/66580953276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc2601cd-efb0-4d04-8e43-fa718dea03bf/bafuratozogojufute.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/iolite_stone_hardness.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/types_of_sushi_roll_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e9c250c-4229-4b26-a983-2dedd05ea69e/sowesukaju.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/xulasasefowota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428ef48a-6822-4979-8023-992e34484214/koontz_lake_houses_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce940bfe-468b-4799-9624-af7602d6dc02/78257281527.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_off0007f413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F413 5544 bytes
SHA-256: 0fa0a8e3c4b00ba8fd8b85a6d36c572d4757ca13573dbe61b2189ef537b7b2fa
font_01_sfnt_off000806cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806CC 13632 bytes
SHA-256: d9c19196ad640562f1e722553563db44b406bc3be5a32f11eb234139b989ad1a