Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0578cb7eb0328e…

MALICIOUS

PDF

88.5 KB Created: 2020-11-29 05:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 496f4daacffdd7731ed6629ec629597c SHA-1: d89323782114bdaedd7fde5432af0ec584a382ed SHA-256: fe0578cb7eb0328e85e284c6a017819e8cdd82dfeee93c9b85cdebd1f18e83fa
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 0.9998

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://trafftec.ru/strik?utm_term=dire+rat+token PDF link annotation
    • https://dobajipewaxegas.weebly.com/uploads/1/3/4/6/134605260/5115907.pdfIn PDF document text
    • https://budaxopam.weebly.com/uploads/1/3/4/7/134711784/4233014.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/kovikur.pdfIn PDF document text
    • https://mivosubewo.weebly.com/uploads/1/3/1/4/131407796/4521844.pdfIn PDF document text
    • https://dofukuligofevo.weebly.com/uploads/1/3/4/8/134869200/vekejezufaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_5fb4d6ca9d840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6198b295-7da8-4a11-9353-13554e080206/scantron_grading_machine_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/10775654008.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/pdf_file_free_download_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/dark_matter_blake_crouch_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/dgf_high_school_glyndon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e5d992-8bcc-41dd-a710-fc263a50717f/rubovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0aee74-8078-49b2-80e2-d1dcbd4960ba/philosophy_of_mind_classical_and_contemporary_readings.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_off000120d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D2 4532 bytes
SHA-256: 093cb1c2596cd5d4c91569e7eb302df715bd8b6355a97110d9ac33d6da9b39f3
font_01_sfnt_off00013050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13050 10932 bytes
SHA-256: 80076a6d93b1d62d13bac621855fce3fdd3d364ea651370a91f291cc96eb7178

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