Malicious PDF — malware analysis report

Static analysis result for SHA-256 be15885a56ef2d38…

MALICIOUS

PDF

75.9 KB Created: 2020-12-18 15:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 60db13957671186ad38e395b5bc8ed30 SHA-1: 6ba0b4e31180a2c96bada8745af53d3e7058bc9e SHA-256: be15885a56ef2d385630a1082a201794be033ce2d8ae7481a830edfe868e2853
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a notable heuristic indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'Escudo de ecuador futbol' and 'wkhtmltopdf', suggesting a lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/strik?utm_term=escudo+de+ecuador+futbol PDF link annotation
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/tukonu_xadateriropisa_vizumi_sabasepurolava.pdfIn PDF document text
    • https://vomagorawu.weebly.com/uploads/1/3/4/7/134720662/1281356.pdfIn PDF document text
    • https://bimufoju.weebly.com/uploads/1/3/4/3/134311804/gugazokarubag_niruluvasafivon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413117/normal_5f9ebad13b106.pdfIn PDF document text
    • https://kefozonijufan.weebly.com/uploads/1/3/4/6/134689321/fa2f7d396bfd64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f9185786b104.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/suzusenasunofo.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/8079879d-d7d2-4081-9ef3-fa6e5364dbfd/bass_pro_peoria_il_restaurant.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc376cddf132613bbcdefad/t/5fc993c89c93c058c47d15d4/1607046088548/mosiwozofugebibi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fcc9d425177ea328cbd2969/1607245123782/idle_goblin_miner_clicker_monster_tycoon_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc009dd8787e87989674e7e/t/5fc1313a4f983757200ad694/1606496571137/58331747752.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B0 5112 bytes
SHA-256: 78617d0fe1c290906986c37811b57e5162f591655a28cbadefc76e3429888d6e
font_01_sfnt_off0000d816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD816 3976 bytes
SHA-256: 79a7f334105397f31bbde27a15172b40d5fb3ae0fa908aaf2218a8462dd7dd4f
font_02_sfnt_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 11292 bytes
SHA-256: 62ad01ebf4bc991ec2ecb344885cb1b058bef176fba9d117c2c44ff70ad70329
font_03_sfnt_off00010b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B55 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36

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