Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf45d5984194cdde…

MALICIOUS

PDF

95.3 KB Created: 2021-04-07 23:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d78341f42e7f1a52de5d41783a7e3f9d SHA-1: 5e7d8c47f105e4d3fe40c0ce3ad9af71e9321e8b SHA-256: bf45d5984194cdde2d0781ec9bc550d7f6066165342d9d2f1367a2c3bf7ddbdb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' indicates the document is designed to host numerous links, likely to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://golowaki.ru/strik?utm_term=ba+ii+plus+professional+battery+life PDF link annotation
    • http://chtotakoevuxom.biz/simply_fit_board_thigh_exerciseshtg48.pdfIn PDF document text
    • http://ttop-shop.com/asan_english_grammar_in_urdu_free_downloadxfq35.pdfIn PDF document text
    • http://astrology-personal.online/omron_hem-711_error_codesmi9u1.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/xibavezixizifenarotu.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/abstract_on_bacterial_concrete.pdfIn PDF document text
    • http://seamanygau.best/winny_earn_cash_moneykrzev.pdfIn PDF document text
    • https://pukokisawar.weebly.com/uploads/1/3/4/7/134749025/nojobifebe-xitoki-bototemowitig-bifemutedekaxu.pdfIn PDF document text
    • https://bexenexitefixu.weebly.com/uploads/1/3/4/7/134725849/1642265.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/sopumugulavuj.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/bevozajilixuwi.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/elements_of_musical_theatre.pdfIn PDF document text
    • http://afracheat1.xyz/happy_birthday_background_design_photos4sn78.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/bab12e39-a207-4001-8be4-b8b791a35100/hp_laserjet_p2035_printer_driver_download_windows_7_32_bit.pdfIn PDF document text
    • http://lobobojisuwifip.epizy.com/joomla_website_free_templates.pdfIn PDF document text
    • http://biwosagamivi.myartsonline.com/99254798078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e32c97-b883-4f2f-93d1-4dbdc76c01f9/how_to_make_a_man_fall_for_you_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abec053-ba39-44f2-8906-33a1a2b34dcb/sotesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024e2041-7319-4945-a277-0512211eaaba/fobonurovugigawavabanag.pdfIn PDF document text
    • http://durunorutap.epizy.com/iso_27001_annex_a_spreadsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be3551a-5585-46a0-bf34-d2ad35e30e12/86650296196.pdfIn PDF document text
    • http://tivapatovike.epizy.com/50_things_the_holy_spirit_does.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_off000132a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A1 5188 bytes
SHA-256: 98b5acc527b6b715172c28ef9dc6f6cf807dd926b0562c5f5a76f26ccef44488
font_01_sfnt_off00014457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14457 12948 bytes
SHA-256: 58c2828e118041f50b9f509aaecede4453b208f63d52dc97c8dece5ade990495