Malicious PDF — malware analysis report

Static analysis result for SHA-256 07da8508932dde3d…

MALICIOUS

PDF

70.2 KB Created: 2021-02-21 08:26:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1cd5ee55cde5d29d90392732d3b4f5fd SHA-1: 1289ee6a5ae19673149b85fd521e08a89d31691b SHA-256: 07da8508932dde3d9e8054a97f6c017375769b2864fa21346c880359157577ff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/strik?utm_term=what+is+another+word+for+a+sensory+receptor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484114/normal_5fca5cb2df35f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476416/normal_5ff7b835a5073.pdfIn PDF document text
    • https://cdn.sqhk.co/jadidawa/gegglma/video_tube_player_download_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/dSgefis/swift_current_soccer_office.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418166/normal_5fec4661a9855.pdfIn PDF document text
    • https://repemokalit.weebly.com/uploads/1/3/1/8/131856723/nelaza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411228/normal_5feec19a2be73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_5ff136af17e4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_60123952bff79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_5fe44dd5592b3.pdfIn PDF document text
    • https://didokizobu.weebly.com/uploads/1/3/4/7/134711826/da0fae572e3f.pdfIn PDF document text
    • https://cdn.sqhk.co/reteduze/ggohcji/fesusejanemajijibi.pdfIn PDF document text
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/16f4df56161f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_5fee07698e2c0.pdfIn PDF document text
    • https://zakosolegim.weebly.com/uploads/1/3/5/3/135337695/porimefig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370266/normal_5ffe9853c3014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fc667ba66d15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_6011d9ab47cff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CD 5420 bytes
SHA-256: 98be212b7398e28afe83fa2c7a986eda39a64ba5e5bc36a6430767ed71978a5e
font_01_sfnt_off0000e452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE452 11388 bytes
SHA-256: 9305c9ac32c687f80a92dc3c771a8c6495ca8e1f00be3a0f7b80dd665757484e

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