Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a891f1af7595fd…

MALICIOUS

PDF

86.8 KB Created: 2021-06-07 21:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eb2b1c1b505582e5f1c07ec17be6e897 SHA-1: 1676e5d77ea28d7eeb9a5dbb61d8c9d398a64320 SHA-256: 00a891f1af7595fddf9dc0586e46856e360dcd663d846e5806657ec94fd80e18
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, including one pointing to 'botokaw.ru', suggesting an attempt to redirect users to potentially harmful content under the guise of providing software plugins. The PDF's structure and embedded links align with a link farm tactic used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/123?utm_term=coreldraw+2019+plugins+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373504/normal_5feccceb233fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410211/normal_60662c5b78358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460709/normal_6009b57513538.pdfIn PDF document text
    • https://pafuzoxim.weebly.com/uploads/1/3/4/5/134585506/jowiriwif.pdfIn PDF document text
    • https://kuwodugedo.weebly.com/uploads/1/3/0/7/130739904/xekokafokawela-raxejirakolamo-bokedisunoxiz-papik.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/cfc23716e099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_6065a156c7636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_5fd1d3a8cc673.pdfIn PDF document text
    • https://wirolarem.weebly.com/uploads/1/3/1/6/131636642/tamoke_vojiraniw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381081/normal_5ff5333018cd8.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/dariz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379731/normal_5fc604fe3a75f.pdfIn PDF document text
    • https://budogifu.weebly.com/uploads/1/3/0/8/130874026/d0ff9e.pdfIn PDF document text
    • https://xosizinunebazen.weebly.com/uploads/1/3/4/0/134017923/pozef.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
    • https://uploads.strikinglycdn.com/files/383dde7c-d720-4213-8879-bee68cf487df/how_to_interpret_scl-90-r.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/f/realidades_1_capitulo_3a_answers_page_50.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/f/data_structures_and_algorithms_in_python_goodrich_review.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/pexipokitef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062da5e0-1aad-4fab-8b20-6d32b6096c31/dexenixuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278dd9c4-508a-4dfa-aaca-2f90a2e01df0/chicago_manual_of_style_citation_book_chapter.pdfIn PDF document text
    • http://jobagej.pbworks.com/f/27870880916.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/naxasunosegoteruwogofiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93031c4f-545d-4062-bdd7-f8a0330a6417/ms_access_vba_save_word_document_as.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 5608 bytes
SHA-256: e3ef72e87b99d52d5f03152d72377ec4b7a6d68a4021c9bf205a4147f78a4eee
font_01_sfnt_off00011b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B20 10732 bytes
SHA-256: c513199afa7345e4fe2f26eb91f0b4e3c13075990e8f469936fac8e92b6b79cb
font_02_sfnt_off00013fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361