Malicious PDF — malware analysis report

Static analysis result for SHA-256 5069573a65d29c21…

MALICIOUS

PDF

107.6 KB Created: 2021-01-11 06:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cd3f0a63baf04bc1174a0700f3cdc5a0 SHA-1: 9dcb83d849d737c85f4b9fd902d09e8b0fac558a SHA-256: 5069573a65d29c210a8d70495a4be2f61e1cc4fe67a9c9a2d980b1a67d5e969b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=south+valley+sewer+district+candidates PDF link annotation
    • https://site-1194826.mozfiles.com/files/1194826/taptap_apk_pubg_mobile_lite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411498/normal_5fed9e421a8c5.pdfIn PDF document text
    • https://site-1173426.mozfiles.com/files/1173426/the_last_remnant_remastered_ps4_differences.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413850/normal_5fdd221439ff4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450864/normal_5fecfe3bd6681.pdfIn PDF document text
    • https://site-1180426.mozfiles.com/files/1180426/xidodowudoxipetofibogoxib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408875/normal_5ff862bf12cce.pdfIn PDF document text
    • https://site-1168349.mozfiles.com/files/1168349/70054478237.pdfIn PDF document text
    • https://fotumepajise.weebly.com/uploads/1/3/4/8/134857071/gusezirivoto-wudezix-padonozexutamo.pdfIn PDF document text
    • https://site-1172017.mozfiles.com/files/1172017/monster_truck_show_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fbf7c172c81d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366317/normal_5ff5420950e03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_5fa77ccd0cb80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/panokojol/arithmetic_and_geometric_sequence_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001587e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587E 5264 bytes
SHA-256: fdd932606e9ada7f8ff3c99cd4f5ff007ee17ac55c21938f0c141ed74337b637
font_01_sfnt_off00016a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A70 13072 bytes
SHA-256: afe935b4344ca8c1b311db2070d91e9cfcd3c523a345bd315931a0893f51ccca
font_02_sfnt_off0001931a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1931A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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