Malicious PDF — malware analysis report

Static analysis result for SHA-256 af60958983d05e32…

MALICIOUS

PDF

81.8 KB Created: 2021-03-08 12:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7bc312d41322bda57e4508177854b8ab SHA-1: f23cae492cfab3c23110016ca88df8b331bbacd7 SHA-256: af60958983d05e32d138ae683590df8714bde1d6532dc32150eabeeab8e3885f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/strik?utm_term=lean+manufacturing+tools+ppt PDF link annotation
    • https://duwafozadujazak.weebly.com/uploads/1/3/1/3/131380008/wasox.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/air_traffic_control_tower_game_freetf3gb.pdfIn PDF document text
    • https://pebuxunuvir.weebly.com/uploads/1/3/1/4/131483235/vomexin_delake.pdfIn PDF document text
    • http://yildirimotobursa.com/gabriel_kuhn_and_daniel_petryp6w6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481552/normal_60113d251c8f3.pdfIn PDF document text
    • http://mabay.fun/argumentao_jurdica02bfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_604167d8efddb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fefe0e24ff6e.pdfIn PDF document text
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/mivumirelagazap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_6002145b8bd73.pdfIn PDF document text
    • http://qunit.space/does_samsung_55_inch_smart_tv_have_bluetootht1wz6.pdfIn PDF document text
    • https://rovorakule.weebly.com/uploads/1/3/4/7/134774255/9363640.pdfIn PDF document text
    • http://fojowufuzuno.22web.org/tecno_l9_plus_firmware.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/jukobovifokataw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473432/normal_5fe6de388dc16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07617677-319e-4578-987a-78d353d1a667/16075097865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11ae9b7-92f4-4849-a420-2674aa7b9b1f/25639639651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543c2f0b-e1cf-4d9b-bdcf-71220dcf0d09/chi_health_council_bluffs_broadway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92409dae-084b-4c02-a8ec-e18dd4c03dd7/sigmund_freud_theories_of_personality.pdfIn PDF document text
    • http://govujetimavex.epizy.com/customs_law_manual.pdfIn PDF document text
    • http://juwesavel.rf.gd/nursing_theories_and_nursing_practice_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d120b6-b369-4fbc-808f-94ddd7b570cd/tp-link_wpa4220_wifi_powerline_adapter_kit.pdfIn PDF document text
    • http://gotapomoleza.epizy.com/rigatunuzixigowitinasab.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_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 5276 bytes
SHA-256: 2c41b7438d40619a13b4b303cb3c586be75ef98a4d1dd9e7ec732204e9bb1d3b
font_01_sfnt_off00011371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11371 11504 bytes
SHA-256: 6f20fc595d2c0a307a6e3405645ce90d6a49b93aa9e2801f5445f0bd77c078a7

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