Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf982abe37c91a2…

MALICIOUS

PDF

84.9 KB Created: 2021-05-16 10:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c93b4eb03a75cb7a8d23bb2899e5024 SHA-1: 3e6c5f70b7c4c1817c07d5fbdbe4df99da879348 SHA-256: 7cf982abe37c91a23ff2461051cc7406a6cefcd65a825769c50f365681ee2a23
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's part of a link farm designed to host multiple links, likely for phishing or malware distribution. The primary IOC is the URL https://botokaw.ru/strik, which is embedded within the document and likely serves as the initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=can+u+take+a+nap+in+contact+lenses PDF link annotation
    • http://nubemeketetu.mypressonline.com/70946833004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445879/normal_5fcbe4417e374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_6062ceb4d2d10.pdfIn PDF document text
    • http://ramidavukul.medianewsonline.com/silver_walter_de_la_mare.pdfIn PDF document text
    • https://vixoketos.weebly.com/uploads/1/3/1/4/131453026/pizipotogid_vagosa.pdfIn PDF document text
    • http://funasowuto.getenjoyment.net/small_businesses_in_south_africa.pdfIn PDF document text
    • https://pokeboxut.weebly.com/uploads/1/3/1/4/131437348/537f90c9.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://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_c47be22d3aa54ed0b31a6b8ef23280e7.pdf?index=trueIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_2bbdbec47e294c5f9cd404114d48f7eb.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_263da8ac95ce4046af98365137441c96.pdf?index=trueIn PDF document text
    • http://tokozod.myartsonline.com/aparato_respiratorio_fisiologia_y_clinica.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/arrl_ham_radio_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/aqa_a_level_biology_student_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/professional_software_developer_cv_template.pdfIn PDF document text
    • http://juwukopegonamu.onlinewebshop.net/zoo_phonics_flashcards.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/sosoginek.pdfIn PDF document text
    • http://vovojoj.atwebpages.com/sojobubidi.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_off0001045f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045F 4800 bytes
SHA-256: 5c5340edeae91d6f0ca6e39f1c10ce5a883ec4b167177a240855ca81db04ad44
font_01_sfnt_off000114c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C3 10424 bytes
SHA-256: fe9cad8a74948810f69e89bfcc898a6805975a4536ae51fe7c11bc96f5c47036
font_02_sfnt_off00013862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13862 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.