Malicious PDF — malware analysis report

Static analysis result for SHA-256 772f63e101ca34d9…

MALICIOUS

PDF

59.9 KB Created: 2020-11-24 04:11:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: be270e6305b5a794039b2a7dfe57e259 SHA-1: 12312fe868cd4b1f378666a4cd620c0297bd7530 SHA-256: 772f63e101ca34d99477a0e34410447885b745ceeb94a9fedf44e8162bd104f7
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffset.ru', which is likely used to redirect the user to a malicious site or download further malware. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=basic+electric+circuit+analysis+johnson+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f94d827451e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_5fae203fc3df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f88d89c7def8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/empires_and_puzzles_cheats_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/swarm_simulator_achievements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a62fa5-c62b-4984-873b-42b05a5070c1/bikamuzot.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/77205860420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ad3059-5259-489d-bc97-dfd9c4a0d9f1/dark_sun_monster_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c27d3b-d68c-4da4-83e7-ae6a50185ca7/wawab.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/simple_english_vocabulary_words.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/53803799761.pdfIn PDF document text
    • https://s3.amazonaws.com/rotafasaniz/j_cole_4_your_eyez_only_download_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f9d67e-6ce3-4d27-8d69-e639cb6de408/bayern_new_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b39cec7-7b4b-461e-bb31-dc250c5252d1/best_drink_bottle.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_off0000ae3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3A 5468 bytes
SHA-256: ddb94cb9ed004240946f2a0e64bfdabad0d329a313d14606dc658cac9d174d6c
font_01_sfnt_off0000c0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DE 10096 bytes
SHA-256: c3451ed2c8b702e215fd3423952b5326aa604dce19e684e9fd93e9ae7273fcf5