Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abbc668d31e8134…

MALICIOUS

PDF

66.5 KB Created: 2020-12-01 16:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 90a5605bb87a396531fe8182a2c95707 SHA-1: da6da9d7caf7ef8aded8efe638826ca56102913a SHA-256: 6abbc668d31e8134cee37eed157ad633a4107d4dfb85bd9654feb03b1638749b
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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=respect+for+all+week+2017+pdf PDF link annotation
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/sozadawamani-vipowa-buwefimev-tovevopexewad.pdfIn PDF document text
    • https://jazezuko.weebly.com/uploads/1/3/4/3/134389352/fuwuxogulu-kejobaxusatox-risegaze.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/savak.pdfIn PDF document text
    • https://bufetijakuvarit.weebly.com/uploads/1/3/4/8/134878832/vujoxepuzo.pdfIn PDF document text
    • https://toguvanamevodo.weebly.com/uploads/1/3/4/6/134615804/sirubatifesazubaji.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/pasisezogal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5fa8db3b740db.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/bisazabe/cambridge_advanced_learner_s_dictionary_apk_pro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1dca7849622016c3a880/1606229450551/30371609612.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/video_bts_dna_bedahlagu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0d466a371610b8797e21/1606225223106/lenewosogadixofevidelam.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_off0000c63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63A 5720 bytes
SHA-256: 8b7a3229466238ff05ef0d27e4e1efac57135c9ce40f80b02650b8255784afea
font_01_sfnt_off0000d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 10488 bytes
SHA-256: 4eed8a550ba5dd85a220b2e6a9ce21576b069680ea7846fbd19369394d5b2d73

Open this report in the interactive analyzer, or submit your own file for analysis.