Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3cf4f90f0ff2bad…

MALICIOUS

PDF

93.8 KB Created: 2021-03-18 23:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 57b14d5f35e15a55a0e2bf5f5eff2344 SHA-1: cafec1e907a788ca2195f96c960309cf27515c00 SHA-256: f3cf4f90f0ff2bad1e99fad31150e1d6920df97f153b5d42f0e0d54201a24fc3
126 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to search queries, directing users to potentially malicious URLs. The presence of multiple external URIs and the link farm heuristic indicate an attempt to redirect users to phishing or malware hosting sites.

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://pelibifir.ru/strik?utm_term=how+do+you+take+apart+a+washing+machine PDF link annotation
    • http://scoretdho.best/sig_sauer_p226_rx_romeo_1_slide_kit_sig_p226_rx_rmray0vg.pdfIn PDF document text
    • http://hightrade.club/solicitud_ante_la_secretara_de_relaciones_exteriores_para_una_empresa75pap.pdfIn PDF document text
    • http://idealicaufficiale.website/nombres_de_selva_scouts_manada7pyyd.pdfIn PDF document text
    • http://boost-store.net/figure_of_speech_worksheets_for_grade_8_with_answersitn7s.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/sibhahg/muvutif.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/hhjficP/bearded_dragon_names_for_boy_and_girl.pdfIn PDF document text
    • http://biviloja.iblogger.org/weather_report_for_frostburg_maryland.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/bgcBajh/38014951844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemefalokoxor.epizy.com/how_do_you_fix_a_garage_door_opener.pdfIn PDF document text
    • http://vidarepi.epizy.com/factoring_trinomials_when_a_is_1_worksheet.pdfIn PDF document text
    • http://kedekivotizera.epizy.com/5392833933.pdfIn PDF document text
    • https://6090ae5c-070c-4b50-bfd2-11a66789f099.filesusr.com/ugd/83cce3_ced3c93abaf84ab3831f15ebd4f279db.pdf?index=trueIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_7c6ccf494b2647109e340b0e8f3e63e1.pdf?index=trueIn PDF document text
    • http://depegiwisa.epizy.com/serotonin_dopamine_interaction_in_memory_formation.pdfIn PDF document text
    • http://soriwolawiri.epizy.com/81250677089.pdfIn PDF document text
    • http://kagexiju.rf.gd/peavey_bandit_112_price_canada.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_6c3f7010de1341fa962915eeb3a2c1f3.pdf?index=trueIn PDF document text
    • http://venakato.epizy.com/newsela_answer_key.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_639e1c7877f24240a34213d085870f83.pdf?index=trueIn PDF document text
    • http://katewamopexo.rf.gd/letter_d_template_for_preschool.pdfIn PDF document text
    • http://fapetaboxepug.rf.gd/canon_powershot_a520_batterie_wechseln.pdfIn PDF document text
    • https://a19d597f-2220-41b3-9459-688249e8a20b.filesusr.com/ugd/f19f53_2d9a300ea01d43f381fd5363984272c4.pdf?index=trueIn PDF document text
    • http://wuzuvulas.epizy.com/86161841290.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B83 5676 bytes
SHA-256: 98b6ed54034d659a3028f2c213782ef559a1d79de59185464470bbfcb8d8a8a6
font_01_sfnt_off00012ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC9 10972 bytes
SHA-256: e910ff77983c0d87769d068c9954eeea22ba3b685117c3661eb3a5012b487960
font_02_sfnt_off0001545b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1545B 16148 bytes
SHA-256: 51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04