Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a2cb7789361bfe…

MALICIOUS

PDF

82.8 KB Created: 2021-04-25 03:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d50cfd6b1f7f0bb5fe2df5447f07c8a0 SHA-1: 7b34c518e0338654a3e1b0bfd71d75989204ea81 SHA-256: d9a2cb7789361bfe1a1fe85182858e5c74226d82abc8659b60d2ced2b6a6bfa7
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious 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://lozipotod.ru/strik?utm_term=how+to+mod+diablo+2+lod+single+player PDF link annotation
    • https://cdn.sqhk.co/wozepefiga/ageWja1/swingman_jersey_vs_authentic_nike.pdfIn PDF document text
    • http://e-devletodeme.net/trnsys_manual1jdgq.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/vinland_saga_volume_12_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/JTVwtii/find_my_phone_number_iphone_7.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/84178878475.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/baFMHfP/palujijuvogilakaralisef.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/budabojelozu.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/dxjdWTf/bowl_synonym_starting_with_e.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/ieiahg4/scary_clown_laugh_sounds.pdfIn PDF document text
    • http://moscowflowers.shop/sql_queries_examplesfkp9b.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/haJ4jf7/defamobawi.pdfIn PDF document text
    • http://kalavar.xyz/965924823637u8uu.pdfIn PDF document text
    • http://gavojutopubiri.getenjoyment.net/bakalsk_prce_osu.pdfIn PDF document text
    • http://lerimofo.mywebcommunity.org/technical_analysis_investopedia.pdfIn PDF document text
    • http://mebelrostov.ru/83603988914so5a8.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/j10Usii/hereford_police_scanner.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/rnhdOIB/30471705863.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/good_interview_questions_to_ask_project_manager.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://dukowiniwamew.rf.gd/arthur_miller_all_my_sons.pdfIn PDF document text
    • http://dotopaku.atwebpages.com/anatomie_du_coeur_cours.pdfIn PDF document text
    • http://fatapiwav.rf.gd/28537863300.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/56661832690.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/koloxetebem.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_off0000f5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AB 5496 bytes
SHA-256: 05a0c48079fafa5c308a0687798ae8c37216abbc3540d699866b7659f8d4be79
font_01_sfnt_off0001084c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 11700 bytes
SHA-256: 33aae258b8684f2d11b6fb2e9038710cd46bff8f63d5f9515e1221ef9be77641
font_02_sfnt_off00012f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F57 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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