Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02d545ab8f3371a…

MALICIOUS

PDF

78.6 KB Created: 2021-05-21 18:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2154dd57bd55609a2e0f4545e90747f4 SHA-1: 74cc2804c089e5d7621a970e0b8be4045c469e29 SHA-256: f02d545ab8f3371af4503c0d16e48f1548ebfb87ef45bd209432cc2b61c677c1
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/strik?utm_term=shadow+fight+2+special+edition+hack+version+mod+apk PDF link annotation
    • https://kikuvutu.weebly.com/uploads/1/3/5/9/135965216/6489357.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/nodudoliwofemu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377908/normal_5ff32f8807bab.pdfIn PDF document text
    • https://gixapogaruxa.weebly.com/uploads/1/3/4/3/134331356/8337224.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/2b09997.pdfIn PDF document text
    • https://guwixuwekolarap.weebly.com/uploads/1/3/2/7/132740580/9910355.pdfIn PDF document text
    • https://zibekasosux.weebly.com/uploads/1/3/4/0/134040395/1753332.pdfIn PDF document text
    • https://bemijeze.weebly.com/uploads/1/3/5/3/135302335/7052637.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/156480.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/a2f4796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_601795bfdb1f0.pdfIn PDF document text
    • https://gelejidog.weebly.com/uploads/1/3/4/6/134688201/b71db675ababba8.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/gudukupir/50515989881.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/leptospirosis_guidelines_doh.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/biology_textbook_grade_10-12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c81d91a-250b-41db-aa6c-90e59661ead9/1991_chevy_s10_4.3_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a258f3d4-a128-485e-8397-1d0a9a3d2c84/fakuvazomozakujobejosokef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b233e18a-3011-4a46-89d5-868abf351e88/digitech_jamman_stereo_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3199a902-29b8-4958-96c4-3d5fff097848/mivotobemisiriv.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_off0000e728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE728 6020 bytes
SHA-256: 03bc4d6856892815238abbc66db8db2a209e1a1ccf33409a8f4f50cebd131b15
font_01_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 22888 bytes
SHA-256: 9f586062b736c4eca04a528edefc6106efd265d9ebdb23a86926835115c827ee