Malicious PDF — malware analysis report

Static analysis result for SHA-256 c589da09f0af9f67…

MALICIOUS

PDF

75.2 KB Created: 2021-03-11 23:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c45fda156177e233efabe5f69f741739 SHA-1: 8f598cb4e3b682d96229253ce03d8698df09eb76 SHA-256: c589da09f0af9f6790e88910e27a6983c512015fb4b3e72cb1cd77a2f416051d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://ponafet.ru/123?utm_term=math+graphing+inequalities+worksheets PDF link annotation
    • https://cdn.sqhk.co/xejudawadoni/3iaIggj/sling_tv_channels_list_fox_news.pdfIn PDF document text
    • https://cdn.sqhk.co/fixefalid/7fOgdhh/gasexadezomokopupuku.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/dVhj7gg/bijitotufin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_601785e4e8ac1.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/jgcw1hg/tchibo_cafissimo_compact_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/sghgjhe/evacuation_map_sonoma_county_shady_fire.pdfIn PDF document text
    • http://vujavapekebabop.66ghz.com/lubifutoxirojox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5fcd5dde15491.pdfIn PDF document text
    • https://narefipikabisip.weebly.com/uploads/1/3/2/6/132682930/5fd2f829.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/does_the_constitution_explain_the_electoral_college_system.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/sm-t350_lcd_screen_replacement.pdfIn PDF document text
    • https://kesizibewasi.weebly.com/uploads/1/3/0/8/130813921/432fc5.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/clover_pos_system_rates.pdfIn PDF document text
    • https://xisidugaboker.weebly.com/uploads/1/3/4/4/134436298/a38f6a06265.pdfIn PDF document text
    • https://dimomivij.weebly.com/uploads/1/3/4/5/134504604/ff75f4ecbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabulegewuwal.myartsonline.com/the_pigman_audiobook_chapter_6.pdfIn PDF document text
    • http://lewabebobi.rf.gd/88170432226.pdfIn PDF document text
    • http://kesobiw.rf.gd/financial_statement_analysis_course_online_free.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/crockpot_pot_roast_cook_time_on_low.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/bruchrechnen_vermischte_aufgaben.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 5368 bytes
SHA-256: 7ebf8c12e9018eb9ab8a3bb10510395da530313f686b5bddcb72790c3fc878c1
font_01_sfnt_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 10564 bytes
SHA-256: 03d69b883adb86ccb08a3dd1e9bf35c509c3cbbfe90db45dd549a9deff121a19

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