Malicious PDF — malware analysis report

Static analysis result for SHA-256 6073e9a9a8c2071c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-07 14:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e2b53b410ab19fa2a389528748cd90a5 SHA-1: 43ef543d82bdf56f3b78a030bff455c059b49903 SHA-256: 6073e9a9a8c2071c18cb6786ce9cce0fc8352582d49e73da50aff45556e0a07a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9846

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 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://resalured.ru/strik?utm_term=canon+mp250+printer+driver+for+windows+10 PDF link annotation
    • http://jovopomutulilo.medianewsonline.com/nicomachean_ethics_book_3_chapter_1.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/how_to_rune_magic_knight.pdfIn PDF document text
    • http://barefevevudan.iblogger.org/8310480057.pdfIn PDF document text
    • http://xuvepawa.iblogger.org/zufokejosi.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/zozidosas.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/husky_air_compressor_30_gallon.pdfIn PDF document text
    • https://sasikeruxet.weebly.com/uploads/1/3/4/8/134851076/benibarozemabu_zolum.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/11077463470.pdfIn PDF document text
    • https://vejupurujiku.weebly.com/uploads/1/3/1/6/131606174/bixapogixujukum.pdfIn PDF document text
    • https://giwitororozesal.weebly.com/uploads/1/3/4/6/134652081/75c9047c39a.pdfIn PDF document text
    • http://fudidudigas.iblogger.org/80004821501.pdfIn PDF document text
    • https://senakubedezozi.weebly.com/uploads/1/3/1/6/131606366/weminez_lixegadud_zuzuk_nemiwogawide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wepadikonotu.epizy.com/16554933906.pdfIn PDF document text
    • http://kelutezawixe.epizy.com/mental_endurance_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/likipemoponatosizub.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/fozurunupufo.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/4555470207.pdfIn PDF document text
    • http://xowomowipuzu.epizy.com/sync_3_android_auto_update_date.pdfIn PDF document text
    • http://nepopujadulipid.epizy.com/75701065302.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/38817609348.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/89770962281.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/48224486484.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 5568 bytes
SHA-256: 8e2bbde26ecd03f4145ba840f3d1a2139872ac26f9b970bf61778bd6d06a6778
font_01_sfnt_off0000fc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6B 10848 bytes
SHA-256: 38088fd08997bd18579d8186332823b86dffad3a2d84076114b53c3b60ac4e84
font_02_sfnt_off00012193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12193 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f