Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf603e0ff0a992c8…

MALICIOUS

PDF

72.7 KB Created: 2021-04-09 20:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a5d06af7ce1fa5f5c927fbc9d573d4e6 SHA-1: 845ff0204816440424702b336866501ed483ccbb SHA-256: cf603e0ff0a992c8a996578013df89dadb5cf04b04dfd3b0f8a7c97ad6b054f1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=mistborn+the+final+empire+audiobook+reddit PDF link annotation
    • http://natorg.fun/tutorial_cade_simu4x7zp.pdfIn PDF document text
    • http://semasinizitowo.medianewsonline.com/65010845862.pdfIn PDF document text
    • http://idealica-italiaoficial.site/xamiklj22s.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/cbse_hindi_grammar_textbook_for_class_6yudrb.pdfIn PDF document text
    • http://useplafond.xyz/how_does_diversity_contribute_to_societyx7l0g.pdfIn PDF document text
    • http://silusexiva.iblogger.org/arvore_genealogica_em_ingles.pdfIn PDF document text
    • http://deutschebank-meine.com/echo_cs_400_chain78dvv.pdfIn PDF document text
    • http://malapiwo.66ghz.com/givowofomivomasujavodube.pdfIn PDF document text
    • http://dombitarf.ru/ue_megaboom_app_for_iphonefvreo.pdfIn PDF document text
    • http://women-ita.space/ralanuzizumuq9q42.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
    • http://makonejun.rf.gd/58682774168.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/franny_and_zooey_book_cover.pdfIn PDF document text
    • http://xozumuzexo.epizy.com/tanifexazojimofefo.pdfIn PDF document text
    • http://jolijugidepim.rf.gd/gorepezilovekimuxogaded.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/dirt_devil_featherlite_deluxe_carpet_shampooer_manual.pdfIn PDF document text
    • http://deravamosu.rf.gd/giwiroburuxuguture.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/duritotiwuzejolikixaj.pdfIn PDF document text
    • http://fipabazubigu.rf.gd/representation_of_peoples_act_vision_ias.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/57395502014.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/what_does_mev_bible_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/how_much_does_it_cost_to_book_life_in_the_uk_test.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_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 5372 bytes
SHA-256: 3fd3b73dfc129f83c96ecaf8b3188a8fc74023859121c849e0d1b6892fff47ba
font_01_sfnt_off0000e4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AD 10012 bytes
SHA-256: 4759aaca562fa63af8bdde85e242d65790685ffa6a8565ced7bf906b21744df1
font_02_sfnt_off000106ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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