Malicious PDF — malware analysis report

Static analysis result for SHA-256 6280e4375c267a9d…

MALICIOUS

PDF

67.2 KB Created: 2020-11-11 20:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2c6503ee510277162ff39a682352f547 SHA-1: 972140ead41bf407ba428729dd883f1d7f552fa5 SHA-256: 6280e4375c267a9d0b62c180e85a022522215523c396612efcd60d42dd3558f7
156 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 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://trafffi.ru/strik?utm_term=wie+man+zuckerfreie+marshmallows+her PDF link annotation
    • https://jovonawokemurif.weebly.com/uploads/1/3/4/6/134678447/dukexuzesevef_wipalenupubeleb.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/7e9eafa4d81e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8a4bc839fa9.pdfIn PDF document text
    • https://xizukuzu.weebly.com/uploads/1/3/4/6/134606793/walatabupe.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/bisute/raxokusegupafivejabi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/63413969620.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/need_for_speed_no_limits_hack_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/spotify_premium_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/daveranajefepojo.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/staff_performance_appraisal_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/bsc_computer_science_books_for_free_in.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC243 5340 bytes
SHA-256: 0eeb3debe854270bae44079640780b6925ca162b5abf42831bb1d4836c98bf7b
font_01_sfnt_off0000d45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45E 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 10260 bytes
SHA-256: a33dbefa14a2e1bbb6e5a72bb224fa452959df3605c580a95e6eb034521e97bd

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