Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c00de60211d0ca…

MALICIOUS

PDF

73.4 KB Created: 2021-03-04 23:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 59311c10d375d12a89ba2b26345e8325 SHA-1: 4fe552aa9d972d403f9387503203be45c992364c SHA-256: d1c00de60211d0ca2fc8377461923b3dc06005f5b2068e92c697cb441186b9cb
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URIs, with a primary URL pointing to a suspicious domain. The heuristic findings suggest the PDF is designed to host a large number of external links, potentially for SEO manipulation or to distribute further malicious content.

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://botokaw.ru/award?keyword=directv+holiday+music+channels+list PDF link annotation
    • http://dadivasim.sportsontheweb.net/singer_7469q_confidence_quilter_electric_sewing_machine.pdfIn PDF document text
    • https://tuvepovuno.weebly.com/uploads/1/3/3/9/133997374/pagokodojafari-ketuxoxazupaxa.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/56371704479.pdfIn PDF document text
    • http://golixudib.mypressonline.com/wikaj.pdfIn PDF document text
    • https://bonawoxe.weebly.com/uploads/1/3/3/9/133986387/faxijudiviviwa-ziwowagofi-kuwawikit.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/XpcYuge/plus_point_app.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/ibihpgd/rirutomivizi.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/fujadabez/how_to_use_vicks_warm_steam_vaporizer_v188.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/present_perfect_continuous_esl_activity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c523eeec-2001-4323-a001-5d2cb650d347/xizikuforibumuwulaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17c692d-ad1b-435f-8901-22d3027c2a7c/kedejiwamidelizegololevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3342ec50-99b0-4edf-9c93-f7f5e999ae24/delemutiwutewasosenafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b329c133-21f9-42e7-9399-ef24be0b4283/vifudeti.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/samsung_scx-3405_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/96403456078.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/duwukejenisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d158cea1-1aad-4e26-b13b-41fc560752e3/78953414680.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/operant_conditioning_schedules_of_reinforcement_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3E 5340 bytes
SHA-256: 6083d29e6124485554d42aad7b035fbc996f56a91d2534f914bc904a8532d860
font_01_sfnt_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 12792 bytes
SHA-256: c3d194e5f77a08f94594567b4af9f1d58c70a2775796c799f2c2ae5dd4ae1a74

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