Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ca2e622f7ee671…

MALICIOUS

PDF

76.9 KB Created: 2021-03-02 18:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 964941388a9f12e6fccb32e88fee8b55 SHA-1: f81fa76fc8fa4c204c4a3d1da4833aaa0f09e9a0 SHA-256: 00ca2e622f7ee67125a6ddd7c67385454daee4830920839f413617659cf7863c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to deliver malicious content.

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://gimoguvi.ru/strik?utm_term=kidde+smoke+alarm+manual+i4618 PDF link annotation
    • http://ru-order-687646765445.art/sansa_clip_4gb_batterybj985.pdfIn PDF document text
    • https://xasuzetevoke.weebly.com/uploads/1/3/2/6/132681443/nenujoneb.pdfIn PDF document text
    • http://affilateapp.online/94703091037xijpb.pdfIn PDF document text
    • https://valuzobuxile.weebly.com/uploads/1/3/2/7/132711949/c66f2c7c41651c.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hgfFifW/repost_app_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/Uv7w6ie/download_among_us_pc_mediaf_re_gratis.pdfIn PDF document text
    • http://com-signto5.xyz/55885168294gwl34.pdfIn PDF document text
    • https://cdn.sqhk.co/vutabopi/Vigsdgg/44863755433.pdfIn PDF document text
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/24588d93d2b623.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/adjectives_key_stage_2_worksheets.pdfIn PDF document text
    • https://niregesop.weebly.com/uploads/1/3/0/7/130776037/sojaw-lumukewusop-jutorazaf-lefemol.pdfIn PDF document text
    • http://popularchoice.space/pebawhu82x.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/joman-vebasekapezu-pepuvuv-fitodogumarep.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/gcjcihF/nfl_rush_gameday_apk.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/a2b0fc.pdfIn PDF document text
    • https://pupalizote.weebly.com/uploads/1/3/4/7/134716330/metifijuzuzij.pdfIn PDF document text
    • https://serelikiwep.weebly.com/uploads/1/3/4/4/134476809/127121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juruzimezez.rf.gd/are_smart_scales_dangerous.pdfIn PDF document text
    • http://zukewazidokik.rf.gd/26823343768.pdfIn PDF document text
    • http://bofetotazefonuv.epizy.com/97043763783.pdfIn PDF document text
    • http://jirizaxewusi.epizy.com/30501548883.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_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 5492 bytes
SHA-256: 5d83eb2decf634602b6d415f8fd6b732978987d30e0e7b0b91d297b44e27b572
font_01_sfnt_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 11008 bytes
SHA-256: 610ef67b2ce301531404a300cb1088fcb6040cdfd37ca6ceade523f7b230d0a4

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