Malicious PDF — malware analysis report

Static analysis result for SHA-256 7091576c60b61e3c…

MALICIOUS

PDF

79.3 KB Created: 2021-03-10 22:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f63ea463f8b82707d4b1b76bdfa905f6 SHA-1: 5c87ba5ec68b6ac53710494ee3a779baa3e71061 SHA-256: 7091576c60b61e3cf4094ec708059e81fd8191e62094b46e5488817341c6b4c9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/aws?utm_term=humminbird+piranhamax+197c+di+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416299/normal_6013760a7d07e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_6004badf60e88.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/wexopituzipuwajivuguj.pdfIn PDF document text
    • http://vofuvomo.iblogger.org/gikotipapukuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_60490e6124a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465250/normal_6044f4fc3caa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_603e1d64904d5.pdfIn PDF document text
    • https://zuverikaniwofu.weebly.com/uploads/1/3/4/1/134108987/tafusokafiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495838/normal_600da7b606052.pdfIn PDF document text
    • https://menuzuxa.weebly.com/uploads/1/3/1/0/131070619/9aff85ec51c23a6.pdfIn PDF document text
    • http://robekilatufage.iblogger.org/bulletproof_cookbook_download.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/baby_groot_and_baby_yoda_christmas_shirt.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/5867960.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_5ff389c9b417d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_602288dcd747e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372681/normal_6007c07ce8151.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/geometry_worksheet_similar_right_triangles_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_603530196dcde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_519118cc6d2a4f11a8f3e3629afc7f3f.pdf?index=trueIn PDF document text
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_a47fee3127234bf49b7af0cb578cede5.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/nisidebatakofalapagabige.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_4106be1e4f7e439bae1b2e5c6c63eed3.pdf?index=trueIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_449113f9b2d941d3a304d5e1f2cda413.pdf?index=trueIn PDF document text
    • http://kitasavino.epizy.com/kofobovunid.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_off0000ed5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 5712 bytes
SHA-256: 9491e37c785b3566113a900434c328ad7d3c46664bf159b7339d9f0c6c94ce14
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 15176 bytes
SHA-256: 5bc2e046f20fa17f9fb5b960f895a12a1491e43d8f5c787429baa12f9c41dff2