Malicious PDF — malware analysis report

Static analysis result for SHA-256 985dec931b880d60…

MALICIOUS

PDF

80.7 KB Created: 2021-04-04 06:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e1846d0719e0f20c9489256c3c771e7b SHA-1: ef786165f993227c07dd4ffe7a800f2e1f0e8f64 SHA-256: 985dec931b880d60a617b6b6a33d78c095a95d46339a0c4ee0c2c83f6fb8636a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to disposable hosting or domains with unknown reputations, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies the document's structure as a link farm on disposable hosting, reinforcing the phishing or malicious redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=is+the+film+the+accused+based+on+a+true+story PDF link annotation
    • http://wumewil.sportsontheweb.net/72971151064.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/90735810868.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/76293969829.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/qu_significa_la_palabra_destruir_en_la_biblia.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/biology_syllabus_for_class_12_maharashtra_board.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/ed_sheeran_castle_on_the_hill_acoustic_chords.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/how_much_is_carlton_cole_worth.pdfIn PDF document text
    • http://kigumelez.medianewsonline.com/42610144796.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/mzgjjjR/twisted_tea_alcohol_content_vs_beer.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/hbgcIhi/28825221063.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/BTgeic0/97386451180.pdfIn PDF document text
    • http://fedexonep.mypressonline.com/critical_race_theory.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_b0ff578aa86b4be9b20544dae3fb7b27.pdf?index=trueIn PDF document text
    • http://wojibikifi.myartsonline.com/praying_to_die_reddit.pdfIn PDF document text
    • https://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_fc024555c468426ba8bc48eb9fd2f39e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/wedding_anniversary_song_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/adobe_audition_getintopc.pdfIn PDF document text
    • http://lujapekadedi.epizy.com/basic_electrical_engineering_handwritten_notes.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_9d221ffcb06f4da280bd82237d95ba03.pdf?index=trueIn PDF document text
    • http://pavulavusutiki.rf.gd/besiktas_team_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/mechanical_design_engineer_jobs_in_pune_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/rogamazuteres.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_7750850d04494a8d98131f0c83d1f09d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/cyberpunk_2077_delayed_again_2021.pdfIn PDF document text
    • http://merizipu.rf.gd/android_studio_ubuntu_18._04_launcher.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 5440 bytes
SHA-256: 12d32f59e0b98da430c8f7e173edec68cc20c1fd031f70da9d111e43bb1cabb7
font_01_sfnt_off00010f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F77 11012 bytes
SHA-256: f5124e2f99aa0fc64d863335739c9485dd851c0eef218f34ded3dcbbf2794875