Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c02299797b2d88…

MALICIOUS

PDF

74.8 KB Created: 2021-06-11 09:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a149d768f0ef5c6fba9cf1d1c53fc281 SHA-1: 0c793b2dcc0c07c62b065abf7268633ba06415c9 SHA-256: d4c02299797b2d889efec55fdc969b86910c764574210da0a157204fcc88b617
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate an attempt to distribute malware or phish credentials through a network of deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pixomot.ru/pbw?utm_term=downloadable+green+screen PDF link annotation
    • https://lefiluke.weebly.com/uploads/1/3/4/8/134887161/9444354.pdfIn PDF document text
    • https://siganagimub.weebly.com/uploads/1/3/2/6/132683357/4339296.pdfIn PDF document text
    • https://noparerekum.weebly.com/uploads/1/3/4/6/134639333/3943468.pdfIn PDF document text
    • https://bezuxinawe.weebly.com/uploads/1/3/4/6/134600255/dizapafebus-jepemijeduluro-polovu.pdfIn PDF document text
    • https://zobujonewuw.weebly.com/uploads/1/3/5/3/135389851/vosefafidarimexe.pdfIn PDF document text
    • https://kutusavirub.weebly.com/uploads/1/3/4/2/134265758/7d87653369980e2.pdfIn PDF document text
    • https://talesana.weebly.com/uploads/1/3/4/8/134878252/4fa0830d3fc212c.pdfIn PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/7705518.pdfIn PDF document text
    • https://puxosuloboja.weebly.com/uploads/1/3/4/6/134677226/rijopigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xetuduju.pbworks.com/f/1199071067.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/lebemogilomepudinugikut.pdfIn PDF document text
    • http://buxozodevoge.pbworks.com/w/file/fetch/144970263/88885141723.pdfIn PDF document text
    • http://keborekudud.pbworks.com/f/how_to_delete_all_archived_messages_on_facebook_messenger_iphone.pdfIn PDF document text
    • http://bilabegape.pbworks.com/f/einfacher_darlehensvertrag_privat_zinslos_muster.pdfIn PDF document text
    • http://morabef.pbworks.com/w/file/fetch/144746865/stinger_gt_performance_mods.pdfIn PDF document text
    • http://lowigamivux.pbworks.com/f/exercises_first_conditional.pdfIn PDF document text
    • http://xexufokug.pbworks.com/f/how_to_set_up_firestick_4k_remote_to_tv.pdfIn PDF document text
    • http://kesowununak.pbworks.com/f/36121443634.pdfIn PDF document text
    • http://nimedifi.pbworks.com/f/72436782388.pdfIn PDF document text
    • http://ronefete.pbworks.com/w/file/fetch/145026081/dragon_ball_z_cso_file_download.pdfIn PDF document text
    • http://fetinaduv.pbworks.com/f/34840166079.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/xakolejunedojojefas.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/w/file/fetch/145092873/how_to_remove_retained_earnings_from_balance_sheet.pdfIn PDF document text
    • http://wirajudukim.pbworks.com/f/nedemiforopuxe.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/w/file/fetch/144501399/64107119680.pdfIn PDF document text
    • http://fepazonavu.pbworks.com/f/paladin_press_books_free_download.pdfIn PDF document text
    • http://zigunef.pbworks.com/w/file/fetch/144479058/27829838722.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_off0000de63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE63 5336 bytes
SHA-256: 259e32b1889510810aa1a925477dddf00e5eb23b696678ddcc800a12b873630e
font_01_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 10844 bytes
SHA-256: 8dac663e5466831e4d2a481b4a3042560ba49e2ee271654fea5031d7468870e4

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