Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00cc97f6515b29c…

MALICIOUS

PDF

98.6 KB Created: 2021-02-09 21:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5fe37fe7b9fadb52d2f27846d35bf0dc SHA-1: 7a878d1a11d4f2ae6fa700a7d2fa1ece4e4edc6d SHA-256: b00cc97f6515b29c571bbeef4ba3ed196e7d997f9905c416ad8a3dd44b31b5e1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on disposable hosting, suggesting a malicious intent to obscure the true destination. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/aws?utm_term=horde+warlock+leveling+guide+classic PDF link annotation
    • https://cdn.sqhk.co/supetuzitepi/rOjda9X/download_the_king_of_kungfu_fight_mod_apk.pdfIn PDF document text
    • http://palitra-cveta.ru/biological_psychology_kalat0pqhh.pdfIn PDF document text
    • http://shoop-fm.ru/whirlpool_washing_machine_manual_wwdc9440tpvgc.pdfIn PDF document text
    • http://opit.space/insta_followers_gain_app8esy4.pdfIn PDF document text
    • http://drenajkrasnodar.ru/reversibility_in_fitness8qzbk.pdfIn PDF document text
    • http://reduslim-shop.website/nebev6parn.pdfIn PDF document text
    • http://mx50off.pro/car_race_games_for_androidff30b.pdfIn PDF document text
    • https://cdn.sqhk.co/vixivizal/ahdibje/mega_millions_nj_next_drawing.pdfIn PDF document text
    • http://reetodo.online/pictionary_list_of_wordsfuwv7.pdfIn PDF document text
    • https://cdn.sqhk.co/lamijaluxeso/lmyLpjc/xbox_one_series_x_in_stock.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/Pdhigia/new_english_songs_2020_lyrics.pdfIn PDF document text
    • http://wawepeb.22web.org/xazazewizades.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piterar.epizy.com/puxozozalugasukonek.pdfIn PDF document text
    • http://janalusexisowa.epizy.com/ayushmann_khurrana_songs_ming.pdfIn PDF document text
    • http://nuwumunis.epizy.com/84526640096.pdfIn PDF document text
    • http://zoloxufiz.epizy.com/51706857403.pdfIn PDF document text
    • http://jibubifo.rf.gd/movies_maza_bollywood_2017.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/atoms_and_isotopes_worksheet.pdfIn PDF document text
    • http://setiwol.epizy.com/4945837238.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_off0001427f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427F 5284 bytes
SHA-256: 330c22866a399229397e47e1efcd37a83b050ae978ca47a45d338b40d5d74e23
font_01_sfnt_off0001549f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1549F 11844 bytes
SHA-256: f5c0b6dc8a428c432ae1f327082cf66a4eade43fd4e16ccb228e069616e43f98

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