Malicious PDF — malware analysis report

Static analysis result for SHA-256 6581514a94c976c4…

MALICIOUS

PDF

84.6 KB Created: 2021-05-27 07:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d9bb1df22fecccf97b3ec8590e9e5085 SHA-1: 2d83b4f4b3992358329140a8fb6eb30a7bb1713f SHA-256: 6581514a94c976c4e329e060086eadfdc74d7e23b29ba08cd5b867d53f90e454
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM, indicating it is part of a link farm designed to host numerous external links. The ML classifier and ClamAV also identified it as malicious. The embedded URLs, such as https://lozipotod.ru/strik?utm_term=initial+d+street+stage+card+guide, likely serve as entry points to phishing or malware distribution sites.

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://lozipotod.ru/strik?utm_term=initial+d+street+stage+card+guide PDF link annotation
    • https://bumokodujexub.weebly.com/uploads/1/3/4/5/134595190/savubekariterinowek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426269/normal_5ffd305287b83.pdfIn PDF document text
    • https://tumipipap.weebly.com/uploads/1/3/4/5/134598024/436318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_5fe9cfffea2fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_600b1f8221dcf.pdfIn PDF document text
    • https://muxolebutelun.weebly.com/uploads/1/3/2/7/132741382/gegorona.pdfIn PDF document text
    • https://kimivatebuxokas.weebly.com/uploads/1/3/4/7/134702804/foruten.pdfIn PDF document text
    • https://berovifis.weebly.com/uploads/1/3/4/7/134730871/loralawatu_goluzedajutuzi_dewiwal_fusanumolex.pdfIn PDF document text
    • https://puxinuvusovi.weebly.com/uploads/1/3/4/3/134340416/97bf2bbb.pdfIn PDF document text
    • https://xidabasexibure.weebly.com/uploads/1/3/1/6/131637276/2771859.pdfIn PDF document text
    • https://vokajaxu.weebly.com/uploads/1/3/7/5/137511102/4882115.pdfIn PDF document text
    • https://tujakiko.weebly.com/uploads/1/3/0/8/130814553/kuxamefe.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/nuremorad.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/e87a91fa-f745-4474-ae72-d145807b9284/dovonovoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a1f7f6-af14-464e-bedc-7b753403aeed/excel_vba_copy_part_of_array_to_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04bae548-3e44-447e-aea4-b526e51e895a/46461831751.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_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 4768 bytes
SHA-256: c9c4c4076d318966a4b8a9bf70fd6be63bbfbc9d3b62685124675cfda0b996cd
font_01_sfnt_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 5044 bytes
SHA-256: 73252d26ddd53a08cb590bb130320cd7a91295b064e1c9fceb2cead25ed138a1
font_02_sfnt_off00012058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12058 10552 bytes
SHA-256: 93b2b750a741fb48456b12de88d457a9906d8300d4262eb62a879fbf46c60f00

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