Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9803ffb501d5c0…

MALICIOUS

PDF

65.0 KB Created: 2021-02-12 06:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00a2feef355fb6f9acf3c63ca968a362 SHA-1: d7353e24089a5ac8deb2cec9fb16e77bde51e678 SHA-256: 5d9803ffb501d5c05d6a778e2e147a60c250be5d70de295862f4a7acc0c36a2a
134 Risk Score

Malware Insights

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

The PDF contains multiple external links, presented as a link farm, with one prominent URL pointing to a potential phishing lure disguised as an owner's manual. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wb?keyword=2016%20gmc%20acadia%20slt%201%20owners%20manual PDF link annotation
    • https://terulupi.weebly.com/uploads/1/3/1/4/131406892/b143969d8c6e60f.pdfIn PDF document text
    • https://fujuzelos.weebly.com/uploads/1/3/1/3/131380065/bdbe00c31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449187/normal_5fff184635752.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/3286517.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/rikukedibodoluge.pdfIn PDF document text
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/6065320.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/zuponefi/40430009386.pdfIn PDF document text
    • http://pamakejexo.epizy.com/shooting_an_elephant_literary_analysis_irony_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/kerudazawojamilarokujo.pdfIn PDF document text
    • http://mifevup.rf.gd/mowuraluxom.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/code_closers_gear_guide.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_off0000c232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC232 5736 bytes
SHA-256: 0b8c0753764c23f6723703535e1093ea47c339bf196865d20abfb449d889cddb
font_01_sfnt_off0000d5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BC 9724 bytes
SHA-256: 765bbedc01fd2f6b604d8bea86d832347ce02f6f07447c855d944cb2ab94eea1

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