Malicious PDF — malware analysis report

Static analysis result for SHA-256 05132c84348d0999…

MALICIOUS

PDF

77.4 KB Created: 2021-02-16 09:16:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ba073bde8cb717a804956d9f5227038e SHA-1: b09ec52931bb2224be4e3e706e0b842f76ad561b SHA-256: 05132c84348d0999849b89a12525433f60068833506590df674dfdc3e14b2dc5
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. Multiple embedded URLs point to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware sites. The presence of PDF-specific heuristics and embedded URLs strongly suggests a phishing or malware distribution campaign.

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://jottigo.ru/123?utm_term=how+accurate+is+the+16+personality+test PDF link annotation
    • http://samettemiz.xyz/92393055753ylgrf.pdfIn PDF document text
    • http://jumbochecker.com/fubitanojeneia9wf.pdfIn PDF document text
    • http://cz-nitrof.website/fozidibumakuzonobapifaxo5r1m.pdfIn PDF document text
    • http://nextauto02.ru/z3x_crack_36.1cm8jz.pdfIn PDF document text
    • http://ludshop.xyz/cisco_ucs_4200_datasheetgm88k.pdfIn PDF document text
    • http://stickerrus.ru/google_sound_amplifier_appq7v43.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://muxibiw.epizy.com/sf_cable_car_map.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/rfid_attendance_system_project_report.pdfIn PDF document text
    • http://ruxopagotar.epizy.com/may_2019_calendar_with_holidays.pdfIn PDF document text
    • http://kupavojos.epizy.com/zopokajijowutuwabe.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/essentials_in_haematology_and_clinical_pathology.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/western_nc_fall_foliage_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/top_story_games_for_android.pdfIn PDF document text
    • http://xavimew.rf.gd/branko_milanovic_desigualdad_mundial.pdfIn PDF document text
    • http://tesusaruva.epizy.com/metformin_causes_bubbles_in_urine.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99D 5264 bytes
SHA-256: 9a044cd552b59929c38cfa5283cd9196ca527a984f543eab4f06f38b8f17e08c
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 2264 bytes
SHA-256: 1dfa5a553194430751a982bc076c27749df818ed3b7bf45c5722598486ca341d
font_02_sfnt_off0000f5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 10608 bytes
SHA-256: 47610f35716ab40f2f3d522ee4ce04f6308c289b6d6d8865aeba7e606da34d8f
font_03_sfnt_off00011a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A25 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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