Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad39da3ea6bc059…

MALICIOUS

PDF

91.2 KB Created: 2021-03-07 10:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9c4ccea9bc831fb748c0db89ec0128d9 SHA-1: 2bc2533fdb8a7fe528c8f2acfc0a0614bcf89fae SHA-256: 7ad39da3ea6bc059a3573560b29cbaf5a68765d4423d9d033bda59192eeeec29
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Hp elitebook 8570p manual' and is associated with heuristics indicating it's part of a link farm on disposable hosting. The presence of external URIs, including one pointing to 'pelibifir.ru', suggests an attempt to redirect the user to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=hp+elitebook+8570p+manual PDF link annotation
    • http://fredo.run/finekun8d70b.pdfIn PDF document text
    • http://worldworkbook.com/kirefojefenasivepawatuwodido03.pdfIn PDF document text
    • http://flowerport.store/ricetta_caponata_siciliana_di_melanzane2g0o0.pdfIn PDF document text
    • http://mif-smeh.space/bethena_a_concert_waltz_piano_sheet_musiccn78e.pdfIn PDF document text
    • http://blockhcain.host/povatagalujuzazafomokewi2411l.pdfIn PDF document text
    • http://clubstore.pro/consejos_para_ser_un_buen_lider_en_el_trabajos68wm.pdfIn PDF document text
    • http://kugenezajiz.22web.org/48043085486.pdfIn PDF document text
    • http://skidki-day.store/leroy_merlin_scellement_chimiquekj3kn.pdfIn PDF document text
    • http://pimipaxu.22web.org/67053096879.pdfIn PDF document text
    • http://zipibewivuxe.22web.org/valve_stenosis_echocardiography_guidelines.pdfIn PDF document text
    • http://fitness1.space/autumn_template_powerpoint_frees1wv3.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/61036503369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_b3e5c5f5c09a49639f83f859a0b40b52.pdf?index=trueIn PDF document text
    • http://fuvogixus.epizy.com/isometric_grid_paper_1cm.pdfIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_c313d6e25cf641d9a321ab6c3fa62cd2.pdf?index=trueIn PDF document text
    • http://tonubugiloroluv.rf.gd/game_of_thrones_recap_season_3_episode_10.pdfIn PDF document text
    • http://fifomivosa.rf.gd/27647041449.pdfIn PDF document text
    • http://duvodix.myartsonline.com/57570407219.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_2fe3aec609ce4457a04fa18a303e133d.pdf?index=trueIn PDF document text
    • http://wijabotivov.epizy.com/98851233285.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/the_last_song_songs.pdfIn PDF document text
    • http://nenigira.epizy.com/38219305876.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_off0001256d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256D 5396 bytes
SHA-256: ed444bea8016742f64ee8833cc7283489684e3cad84b5e475e140870c065c688
font_01_sfnt_off000137bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BF 11688 bytes
SHA-256: fbbfbe34f98234ba8aaadeed99d2a104856e0c515abb5770f50c64308f60d3a7

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