Malicious PDF — malware analysis report

Static analysis result for SHA-256 862b12603aba40a4…

MALICIOUS

PDF

74.3 KB Created: 2021-04-01 03:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fb92336d7ec2178d6dc272ae9ea1b6aa SHA-1: cc604e97dc150731f280be71f48f48df0391f045 SHA-256: 862b12603aba40a47bdba26e904ac90690fc3c1d32455e35319c9c76ffd0df59
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=how+to+read+a+barcode+without+a+scanner PDF link annotation
    • http://tryraisins.pro/nozavagokazutunago26tm1.pdfIn PDF document text
    • http://complerbnp.com/pioneer_elite_50_inch_plasma_tv_weightkqaln.pdfIn PDF document text
    • http://nokilibetajew.mywebcommunity.org/nokiravekatexesujusovaje.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/wanadupukilezeseguzuji.pdfIn PDF document text
    • http://copyright-rules-help.com/ryobi_40v_battery_charger_not_workingdgfz2.pdfIn PDF document text
    • http://7lessons.space/nidebisimevogaligelakituyg21w.pdfIn PDF document text
    • http://boevoenlp.com/358680769869yrcx.pdfIn PDF document text
    • http://varnisvakq.ru/the_last_stand_update_l4d2_release_date80k9a.pdfIn PDF document text
    • http://blacktea.space/organizational_behavior_and_management_11th_edition_konopaske8xitf.pdfIn PDF document text
    • http://itawegan.fun/megohmmeter_user_manualspyp4.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://normab-id.com/841811252689i3nb.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/urticaria_cronica_en_nios.pdfIn PDF document text
    • http://requiredjokblog.com/14461537527x2kha.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/6c1c719a-02d8-421a-8526-72715975aed9/11523960330.pdfIn PDF document text
    • http://wifofevowogak.onlinewebshop.net/syma_x11_quadcopter.pdfIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_4bf4834216d64864868045523a6eb5e9.pdf?index=trueIn PDF document text
    • https://3d9856c9-ddaf-40ef-ab37-14107f3d3ee7.filesusr.com/ugd/938106_6bb7242df5c9486b829d72c7cc453691.pdf?index=trueIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_7bcd77f7e7dd4b8a83d0d4c3c59be80b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5ff0e0-373d-4d29-a84a-02ce8e5154be/the_giver_chapter_5-8_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f64873-2862-45bc-badc-adb7f164691b/jowag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/824544d9-ab6b-442b-b3b7-cc28bdf751e0/73012464176.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_off0000e4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C3 5188 bytes
SHA-256: 3ffcb583e4b94f63bdf049e4ef7d5252114dc1bdabdce954ffea02c63b2d8a82
font_01_sfnt_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 11028 bytes
SHA-256: a1d014082143b5c48d486279752323197e93ea0aa7eeb1150f053e284ad6fdf3

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