Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f22057af5c2c271…

MALICIOUS

PDF

89.0 KB Created: 2021-02-07 21:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0fadec9a5f93f84d5f129d20242710c0 SHA-1: bbc307d9b761512460bea28b763ed48cba375c40 SHA-256: 6f22057af5c2c271f358b2bf8cf419935d1fee7a40a6a005be8571b4f66a5de3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure strongly suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/aws?utm_term=axial+fan+design+calculations+pdf PDF link annotation
    • http://sedobepotorosi.22web.org/acc_aha_guidelines_for_heart_failure.pdfIn PDF document text
    • http://loxesitigogu.iblogger.org/65079556697.pdfIn PDF document text
    • http://vibuluvizawo.66ghz.com/full_body_workout_routine_for_beginners.pdfIn PDF document text
    • http://zoneeuro.pro/equestria_girls_tales_of_canterlot_highquzqm.pdfIn PDF document text
    • http://kefikajutadab.22web.org/lexopagifowomivifukonopi.pdfIn PDF document text
    • http://7lessons.space/free_fire_tournament_app_downloadhqsbt.pdfIn PDF document text
    • http://klossheff.xyz/gerda_lerner_the_creation_of_patriarchyuwl37.pdfIn PDF document text
    • http://vivunijasu.22web.org/ignou_assignment_name_page_format.pdfIn PDF document text
    • http://bisipatelaloguj.66ghz.com/61160017217.pdfIn PDF document text
    • http://wagugekewa.22web.org/63258048048.pdfIn PDF document text
    • http://copalofa.site/arduino_programming_in_24_hours_sams_teach_yourselfgbx4v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485313/normal_60092db4655b2.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
    • http://ribaxekag.epizy.com/spongebob_running_away_meme_template.pdfIn PDF document text
    • http://fiwimawa.rf.gd/word_templates_for_certificates_of_completion.pdfIn PDF document text
    • http://bukarujinadir.epizy.com/batman_arkham_city_apk_mod.pdfIn PDF document text
    • http://watosoxugulufi.epizy.com/capitalism_free_full_game.pdfIn PDF document text
    • http://mufigodukusa.epizy.com/sistem_akuntansi_informasi_adalah.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 5168 bytes
SHA-256: a874e6fa4a33f996a75fd332c0489c895bda2026e9960c330b1d717fd376fd88
font_01_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 13588 bytes
SHA-256: cdfaab4847a69591888230b32c9bfb9a88dfb2d691532538fbce334304a91d12
font_02_sfnt_off0001332c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332C 16096 bytes
SHA-256: 2dff1fc3e5bf1049a512ca2ab3d4448021a5e4676c0c9a63fbc3d390c83797d9
font_03_sfnt_off000147f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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