Malicious PDF — malware analysis report

Static analysis result for SHA-256 0527056d3680a763…

MALICIOUS

PDF

79.0 KB Created: 2021-06-02 17:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: df3b86d781a85ab85f1db25911b43c99 SHA-1: 6b461a4ab6315cfea86afd8463756ccecbf8507a SHA-256: 0527056d3680a7639dff82b7925f939aa3771836613c77e5b48ec90464b5ca81
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a large number of links, many pointing to disposable hosting, suggesting a link farm designed to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ketchas.ru/pbw?utm_term=ketogenic+diet+book+free+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480891/normal_603e2556b2a41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421627/normal_5feb58da27bbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5ff97ab09c0c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6055f7c99a48d.pdfIn PDF document text
    • https://vimosetadasosus.weebly.com/uploads/1/3/2/7/132740377/17888f289ceab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_605828971bb53.pdfIn PDF document text
    • https://gisevivejomu.weebly.com/uploads/1/3/5/3/135393920/7986248.pdfIn PDF document text
    • https://vokugovu.weebly.com/uploads/1/3/4/5/134598923/2924621.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/0e36d97.pdfIn PDF document text
    • https://dumamawikop.weebly.com/uploads/1/3/0/7/130740251/mumuluteneba.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
    • https://uploads.strikinglycdn.com/files/bef69f58-b126-41c1-810f-80983a6d6fad/mubiko.pdfIn PDF document text
    • http://jitijaloj.pbworks.com/f/why_does_lady_macbeth_want_to_kill_duncan_quote.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/w/file/fetch/144425397/presidents_choice_5_cup_coffee_maker_manual.pdfIn PDF document text
    • http://zajozote.pbworks.com/w/file/fetch/144457323/are_breed_restrictions_in_apartments_legal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb575de-ff78-496f-aa40-54eb0cabc836/how_much_is_a_sub_zero_wine_fridge.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/f/94591771274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c131caf-9d34-4b91-840e-181a369c65e4/18699818787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c90cee-a881-4bbb-80af-a87062145da3/fopotunonen.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/w/file/fetch/144468240/how_to_clean_print_head_hp_3630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a367e5-57f2-4f5a-86c4-1735022ba84d/asphalt_xtreme_rally_racing_hack_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82924196-91ec-4d78-9f28-5977f506154d/47421071984.pdfIn PDF document text
    • http://paditoxef.pbworks.com/w/file/fetch/144495369/bhu_bsc_math_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22693c0c-54d7-44c8-ad10-97b724ed1b92/broken_vessels_chords_piano.pdfIn PDF document text
    • http://xuwuziz.pbworks.com/f/62398513974.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 4864 bytes
SHA-256: 2f7f643bcc3e032e7b4b130a5cbe3754066cd28fa63191b147a86f4bd83dce3c
font_01_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 10604 bytes
SHA-256: 1cf755f793ade3e4fb1cc334679dc1f7da3cfd121ebe9f2295074c306d2aa8fc
font_02_sfnt_off00011e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E85 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.