Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c380223413ae8f…

MALICIOUS

PDF

68.6 KB Created: 2020-12-20 16:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 21af2067599c6df275dd092aad3bf100 SHA-1: 8f17761a1a640a589ec61e12efc52039b1e1c7de SHA-256: 93c380223413ae8f7553483e0eaa45d4b8bf2dd803526f5cf0d4a42ad7b707ce
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://trafficel.ru/strik?utm_term=winx+club+season+1+episode+8 PDF link annotation
    • https://nagipabusodeza.weebly.com/uploads/1/3/1/4/131453106/4360263.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/guvoburitef-wedug-woxipuvomanifos-mepedowefibida.pdfIn PDF document text
    • https://wivixovipi.weebly.com/uploads/1/3/4/4/134442696/6b49e06aaec3d.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/wubul.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/8027752.pdfIn PDF document text
    • https://gowiwoniba.weebly.com/uploads/1/3/1/8/131857243/fa4736599.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/354ecd36.pdfIn PDF document text
    • https://wilunozuwi.weebly.com/uploads/1/3/4/4/134432110/vatofodiva.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/sewozudujav_rofosaporinobi_kopevivevusuj_bizuzoxajetik.pdfIn PDF document text
    • https://fabedajigunud.weebly.com/uploads/1/3/4/4/134480588/4863786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5fb56b80dd6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_5f9cb4fe63b99.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/dudigonifu/marco_pierre_white_white_heat_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/63811661100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d570720f-0139-42e2-a040-c0407a74b2b7/ingenuity_baby_swing_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c773a90-02d2-41c0-b48b-b295f1cab32c/36380805936.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_off0000d034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD034 5440 bytes
SHA-256: 3a36879faec857ccc8cfc5c26e0e8f5c2afa078857c748b2705799301659293c
font_01_sfnt_off0000e2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D9 10060 bytes
SHA-256: 06badab8cff61b257874a828d127d86c8d76e873efcdadeec0992cf2b9148341

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