Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b0de67277566c6…

MALICIOUS

PDF

86.9 KB Created: 2021-03-24 20:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3595e9bdae8cc9c2ec7cfab27d6b2dd2 SHA-1: dece980942fe2ab435f8142ced7190e5a25e43fc SHA-256: 80b0de67277566c63e964a5deba42dc21a2e53ee1c69ca06c2aefc5900f1b7d7
186 Risk Score

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 0.9989

Heuristics 6

  • 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.
  • 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://jottigo.ru/award?keyword=lista+de+verbos+presente+simple+en+ingles+pdf PDF link annotation
    • https://kevigedevuk.weebly.com/uploads/1/3/1/4/131438682/f9e1e.pdfIn PDF document text
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/554a700f70d17.pdfIn PDF document text
    • https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/97de0.pdfIn PDF document text
    • https://gimoxawoja.weebly.com/uploads/1/3/1/3/131380550/kegopetudatefi-likasejitog-fogemer-putagaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/hK3giNS/slap_kings_apk.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/sukenew.pdfIn PDF document text
    • https://mumunemifuber.weebly.com/uploads/1/3/1/4/131406104/465117.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/eE0iZHQ/panzer_war_complete_apk.pdfIn PDF document text
    • https://vemisalisak.weebly.com/uploads/1/3/1/4/131437925/721545.pdfIn PDF document text
    • https://manumuxalobo.weebly.com/uploads/1/3/5/3/135387638/pomogizoduj.pdfIn PDF document text
    • https://xotufidew.weebly.com/uploads/1/3/1/8/131856134/xugoxuke-balatu-guputifidapa-wololes.pdfIn PDF document text
    • https://kegalanomer.weebly.com/uploads/1/3/1/8/131856310/tixesosuzakuresiwoni.pdfIn PDF document text
    • https://fiduvoxasugi.weebly.com/uploads/1/3/4/8/134856114/9e85a94.pdfIn PDF document text
    • https://jaxuguduju.weebly.com/uploads/1/3/4/4/134442137/58ea208.pdfIn PDF document text
    • https://womarunere.weebly.com/uploads/1/3/4/3/134315700/regutipipa_voxawipepokek_kulifopepotuva_texedafosomil.pdfIn PDF document text
    • https://gufulesem.weebly.com/uploads/1/3/4/6/134698375/7932053.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/posiwigu.pdfIn PDF document text
    • https://jifonoru.weebly.com/uploads/1/3/5/3/135316211/sanalibozamadupov.pdfIn PDF document text
    • https://cdn.sqhk.co/fojizejoxu/eghCBic/murder_mystery_dinner_game_at_home.pdfIn PDF document text
    • https://kixofugowewo.weebly.com/uploads/1/3/1/8/131872146/690e36fe977a.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/4c43486d-c65b-4b89-bf0b-3b33d2c067d6/what_is_a_dialectical_tension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72bed9e1-43ed-4fc1-af70-bcedf62b1417/jewirefedubowaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e48d23d-1c69-4da4-ada9-d7c7cc86cc99/best_way_to_build_a_shooting_bench.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c5fc24-ee0a-4676-b236-638d74dd3514/craftsman_68514_staple_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d688b7-56d0-4922-bde6-b99dbcb328a8/how_to_invest_in_gta_5_stock_market.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 5500 bytes
SHA-256: fcfde9c68ea073f2e83bcae8bf2ea364062d57f7487742ec517c0f60891fad66
font_01_sfnt_off00011058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11058 11672 bytes
SHA-256: 2dfac7546c0a48ab04f1776b5bd47f735a85e47cd6509b28722c69b55d2511d0
font_02_sfnt_off00013699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13699 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449