Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2d6489350ac44d…

MALICIOUS

PDF

79.8 KB Created: 2021-05-07 23:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b71bd721adf7407b90d3a9d113e52bc SHA-1: ccf473066e554982c9c9bcc10e916888b2b27e97 SHA-256: 2a2d6489350ac44dda8861f3639e625e70bcb2185dfe47d9b7c45d5734b09737
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 0.9967

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://gimoguvi.ru/strik?utm_term=why+does+my+portable+charger+not+working PDF link annotation
    • http://teasmall.space/ballet_de_venga_la_alegria_nombres_completosurkfy.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/dhciagh/zemebokadovomul.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://tb-films.ru/pipixijetijasuc3dp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_6052dc45cfe16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528876/normal_6069dfa45db51.pdfIn PDF document text
    • https://maraduwiz.weebly.com/uploads/1/3/4/3/134363873/ff534ca1c96cd9d.pdfIn PDF document text
    • http://dkmz2.club/22439068696xd9bc.pdfIn PDF document text
    • https://cdn.sqhk.co/mekewufi/oWQ5EtX/gozazebo.pdfIn PDF document text
    • https://lawuzifelive.weebly.com/uploads/1/3/4/0/134041442/4cf380cecd0.pdfIn PDF document text
    • https://cdn.sqhk.co/penomufepuk/ojaibii/download_game_fighting_tiger_liberal_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_60035805bae0b.pdfIn PDF document text
    • https://buzomuzugagi.weebly.com/uploads/1/3/4/3/134313884/dumozibuwo.pdfIn PDF document text
    • https://najijufo.weebly.com/uploads/1/3/4/7/134714833/xemefawefujikujarubu.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/YghKjgu/73482770862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501975/normal_6053557bcd445.pdfIn PDF document text
    • https://gematisi.weebly.com/uploads/1/3/4/5/134599806/bagimejagavamiluf.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/e1779302-5858-4522-8a58-304b884c3c58/vobebofe.pdfIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_71844fb8de9a4c438384685130aac16a.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_00a7ba2633ea442b8f813161f78d99a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd49f0f-5308-4ea0-a53f-b14ecd23d262/resumen_corto_de_la_obra_rimas_y_leyendas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18aa7cc5-62da-4b66-9c9e-11bf0174f29c/sotesizogumozejodinazokep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0a216c-2e16-4f2c-8d13-f7d458401b79/77153040419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c26abe-1a3e-4fd2-86da-98b6bee9a103/tuzanikofekuvofejuxobogij.pdfIn PDF document text
    • https://5b0ea1c3-b874-41d5-a3cc-49595beb80a6.filesusr.com/ugd/0c63be_c1aee42ba3cc42168a8b723b8a95b37d.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_82e76b79b6ab404a8e583f03104e1a8d.pdf?index=trueIn 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_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 5900 bytes
SHA-256: 5878c885da40071e50c3e75c4d06992f216e511f4eed34d792096cffdf64c3e8
font_01_sfnt_off00010ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE7 11276 bytes
SHA-256: a1a50d6da4e12bb502149ec9457c745970bdd1a88dd3aa469cb4ac555cb81802