Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3cf1c8cb32c0ad…

MALICIOUS

PDF

60.5 KB Created: 2020-12-27 16:18:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3ce226d713db38b5dc8e703ea51c6cd9 SHA-1: 3b3747c2b305ea44e2d79a0ab28c78d42285338e SHA-256: ff3cf1c8cb32c0ada19988469d16ab606ce2373fd7a53dbfbe429693ff93141e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended to trick the user into downloading further malware or phishing for credentials. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=acgih+industrial+ventilation+manual+28th+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376875/normal_5fdddffe91fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5f999e2d559e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_5fb4ca7c81944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5fa3406c677e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365606/normal_5fc7ee3c45c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_5fa779b9c9989.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/c326f4be-0011-4e73-9841-aecd2b882bc9/missouri_board_of_healing_arts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76e1edb-0119-43ed-93f6-4f6046cde9a4/harvest_cookware_pressure_pro_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/bostitch_cordless_drill_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863278f2-9d3d-4a61-80e1-294496cd1c81/wekewej.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/the_bye_bye_man_unrated_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1011f6-d1c2-4487-a0c4-3dd8509b9e82/jinofozogowozenalowupalo.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_off0000b206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB206 5944 bytes
SHA-256: a0de2ecb80181e61fa3d96b5afb9142dfce523c38c21d40a051efef360ed14e3
font_01_sfnt_off0000c61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61F 9004 bytes
SHA-256: 6aba1ea76df46aac7309fc2c9c3571bc0b3e489c9ab0ef6c69a11d791ce98309