Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4687ecf88c7ab7…

MALICIOUS

PDF

76.6 KB Created: 2021-03-04 06:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a7228ba365ff3746878ea39739aa5daa SHA-1: 42fa8a9c4238d628362fb25cab7e784b048ece5d SHA-256: 1b4687ecf88c7ab75d2ad4383eb2662d0a3000d9e71c7f48b35f51b22cd206a6
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's structure point towards an attempt to redirect users to potentially harmful content, possibly for SEO manipulation or to host phishing pages.

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://soxebez.ru/strik?utm_term=how+to+switch+to+hdmi+on+jvc+tv+without+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379854/normal_6018482b2f153.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/jfidshf/40049311673.pdfIn PDF document text
    • https://xesizoge.weebly.com/uploads/1/3/1/4/131452949/luzotabenurobikuvu.pdfIn PDF document text
    • https://nokogijesa.weebly.com/uploads/1/3/1/4/131452879/lowosit-jevev-koxuvuzodesis.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/hhKAJrO/patipovugunipoxowetepizev.pdfIn PDF document text
    • http://originalhallyu.com/gate_2020_form_fill_up_websitednqek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449990/normal_5ffe7c3a3445c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454046/normal_60324d6fb4151.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/zggLgHQ/bowling_alley_kingston_pike.pdfIn PDF document text
    • https://cdn.sqhk.co/mewovegid/GjeuBB1/fruit_smash_hard_seltzer.pdfIn PDF document text
    • https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/b9e21.pdfIn PDF document text
    • http://gufutaca1.xyz/abas_ii_scoring_manual481pe.pdfIn PDF document text
    • https://cdn.sqhk.co/tefegegesuxe/cClhcof/empire_warriors_tower_defense_td_strategy_games_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_6029a9166f97e.pdfIn PDF document text
    • https://nexirexosevexos.weebly.com/uploads/1/3/4/5/134500935/ea221ce467d3.pdfIn PDF document text
    • https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/pulopozebibad.pdfIn PDF document text
    • http://qrettalq.online/case_information_statement_nj_superior_courtofpc9.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/gihijj1/96266590459.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/b20af96dd5768c2.pdfIn PDF document text
    • http://nigasheff.xyz/90778798116i2f5r.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/jijdwMm/smash_it_derby_facebook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ee32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE32 5124 bytes
SHA-256: c19341fd4b36a1cae2c9a6fae6bac4db8756bce9143f2ea52253ea305550bb4e
font_01_sfnt_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 10972 bytes
SHA-256: 2958357940d247d220f0c1e3820cc0eb14656da7e49241ad3c49f04fb39640e0

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