Malicious PDF — malware analysis report

Static analysis result for SHA-256 5847aaaee00ec0ed…

MALICIOUS

PDF

77.2 KB Created: 2021-04-01 16:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2fd9bb1172f52db398d1b49e5b354fde SHA-1: 20f2d2bf10d7c2cf7da3116def32e63a3e5832dd SHA-256: 5847aaaee00ec0edd244bfd692cc53887e7e1891a2321cdd9d06db5d2117d107
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/award?keyword=me6602+automobile+engineering+book+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475997/normal_5fe19f100706b.pdfIn PDF document text
    • http://dakejexisumupok.iblogger.org/grey_king_size_fitted_bed_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495409/normal_604471bd70112.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/d0hM8hf/56954247808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485946/normal_5fd380d9451e4.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/gdgiP5O/march_of_empires_war_of_lords_strategy_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fca9b6d662e8.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/ghhjiaN/73426242766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491439/normal_601b596826322.pdfIn PDF document text
    • http://nubebukexowi.66ghz.com/akira_full_movie_english_dub.pdfIn PDF document text
    • http://zuwazari.22web.org/pekijekikevuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_606549eb0d6e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483591/normal_6037c6dc2ccaa.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/hihbzEv/36572067183.pdfIn PDF document text
    • http://nazulemijoxamif.iblogger.org/fulitusalun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redepulevinevux.epizy.com/wejuf.pdfIn PDF document text
    • http://jitimixilu.epizy.com/update_gradle_android_studio_ubuntu.pdfIn PDF document text
    • http://gusabonatixuk.rf.gd/bonogozosiledegafozu.pdfIn PDF document text
    • https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_c3542655253c41f294a9698ec94a5ec3.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_ccba3cb95ae74c8fa78bf655876e63e7.pdf?index=trueIn PDF document text
    • http://dorerewilaf.epizy.com/craftsman_yt3000_transmission_drive_belt_size.pdfIn PDF document text
    • http://sikovisata.rf.gd/baxakavelewugujixuzon.pdfIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_093c8b9f27c84af1aaf238ba3b1680d2.pdf?index=trueIn PDF document text
    • https://36fde204-cda4-4268-899b-58717f9005d0.filesusr.com/ugd/b13063_50e21225fab64b5191c9d4a0bdc43595.pdf?index=trueIn PDF document text
    • http://fokibuzevurir.rf.gd/silver_eyes_graphic_novel_free_read.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_fbf71e047a2d4e04a7cade8d3f132648.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_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 5912 bytes
SHA-256: 79b987f4c59a6711b6a7422e2862a61720685b00fde08e5189687264053eeee4
font_01_sfnt_off000101a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 10976 bytes
SHA-256: b09404bef8aff4eb52bf3c3e4ae32bfb22c58a057b0e006131a3b2febad157a0