Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b6dc8ead96d2ec…

MALICIOUS

PDF

72.6 KB Created: 2021-05-12 14:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f1a7e8130e7b79cc8049fd95b19e91fc SHA-1: 589645bf54a1591ad96b2181525ac06871252230 SHA-256: 86b6dc8ead96d2ec3974e04b945619bc0484b2b420d5550c4d548e8f72cb67f1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://lozipotod.ru/strik?utm_term=hamilton+beach+flexbrew+coffee+pot+replacement PDF link annotation
    • http://idealslimitaly-official.site/370991716749m9o9.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/assembly_election_2020_schedule.pdfIn PDF document text
    • http://phtech.site/6558433095jcrcf.pdfIn PDF document text
    • https://xikagarema.weebly.com/uploads/1/3/4/4/134489929/553520.pdfIn PDF document text
    • https://menaxogem.weebly.com/uploads/1/3/4/4/134432074/notorapi-liboxuviloma-mananesili-kawuxizufun.pdfIn PDF document text
    • http://rubyshup.space/video_song_website_name2uu1p.pdfIn PDF document text
    • http://maska-respirator.com/kerori2al8l.pdfIn PDF document text
    • http://maewallace.com/xojubexewojuvusewu0btuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_5d69d3d07dd642cfa7d22c1a465e4448.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b775969-0f5d-4687-b649-847a23ae6b19/41890819174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22907c64-dfc0-4342-bcb9-d9a92900ccbb/fagor_multi_cooker_accessories.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_da299265a36c4c7a95c9beaac157a0fc.pdf?index=trueIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_b47ee7278c5a4eb593d592040a4bc2d4.pdf?index=trueIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_505fb9a562b14168941e15ee9557fc4e.pdf?index=trueIn PDF document text
    • http://guxejusoselota.myartsonline.com/partnership_accounts_questions_and_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 5336 bytes
SHA-256: 16db21b9fb9be7a332f0500dd5b40585384a5acb7aa0301abe9bee8ff346f642
font_01_sfnt_off0000ee5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5D 11428 bytes
SHA-256: b59712f854a0f5d5fd49cde1299faad7ec902a9e92ea55948114abfaedfcbda5

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