Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28d3f317bfbc455…

MALICIOUS

PDF

69.6 KB Created: 2021-01-08 07:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3d4dcb7ebbdc2e76d8caca893fd8f018 SHA-1: 91ac7615c97eb2c6f9b435534bdb2100a78f8506 SHA-256: b28d3f317bfbc4557a7d0e0e71a82e8dc5fd9752745a1d174924d54b32ea08db
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that appears to be involved in distributing potentially unwanted software or engaging in phishing activities. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick users into clicking a link that leads to a malicious download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=after+effects+free++windows+8 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389097/normal_5f90572c72506.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/jjiabsl/best_aca_neo_geo_games_xbox_one.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5f8bf1eb4272c.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/nWgeOgd/burger_time_las_cruces_avenida_de_mesilla.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/T6GcLjL/37594547205.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/tojabixefova/estufa_a_lea_de_alto_rendimiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68574b09-37d4-4086-bbad-3c772939d0ee/70891698560.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/cisco_sg350-_52_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007619ab-7125-417c-a974-21a1ba3cb7ca/bow_shooting_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069668db-1a3d-4651-b4d1-266b74bf59d0/lalusameseg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85caac85-03d6-4cdf-9056-be5c98651a1b/rixezinojifuguriwisuleg.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_off0000d40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40B 5048 bytes
SHA-256: 4451ef77bcc7b9ac1444c70b6f3aab4bc2095adf0ae8eab061f8b790855ad8d3
font_01_sfnt_off0000e565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE565 10824 bytes
SHA-256: d002f9df0a6f116c1968e83dd8481a208e1c2a5cae3563ef53163a59e1790fd9