Malicious PDF — malware analysis report

Static analysis result for SHA-256 2356f1e8c0a13a00…

MALICIOUS

PDF

84.5 KB Created: 2021-02-27 12:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1bbf6377fc27eda83e38dd71ff4a52eb SHA-1: 9a86935c600031369bacc6b9c9432db7ca220daf SHA-256: 2356f1e8c0a13a00bf16b115eb8983fd38a83303f1f39090d80f17c866f4a4bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, suggesting the PDF's primary purpose is to act as a deceptive gateway.

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://maypoin.ru/strik?utm_term=2017+lexus+gs+350+f+sport+horsepower PDF link annotation
    • http://vizionsmc.net/vintage_cruiser_bikes_for_sale6xgc4.pdfIn PDF document text
    • http://useplafond.xyz/pharmacology_books_for_nursing_studentsnvu2s.pdfIn PDF document text
    • http://mebel-albero.ru/72818200346uhvod.pdfIn PDF document text
    • http://winsl.space/facebook_video_ios6d7sm.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/video_game_releases_2020_marchl5y42.pdfIn PDF document text
    • http://domen3.club/how_do_i_make_my_apple_watch_series_4_waterproofk3lvl.pdfIn PDF document text
    • http://triple-doska6.club/tefajugomaronomuxekinoz0ezhe.pdfIn PDF document text
    • http://carins.info/5555698328437dg7.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/vVBhhiQ/prison_survive_break_escape_crime_simulator_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465025/normal_601342fe8a632.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/b0ziig5/nomivutalafirulazogegipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376875/normal_603447c6b159a.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/jjd9R0j/10035468222.pdfIn PDF document text
    • https://cdn.sqhk.co/soxobiwefili/XLgihhx/at_t_device_unlock.pdfIn PDF document text
    • http://itanto.space/cms_documentation_guidelines_for_amended_medical_recordsnz7l5.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/6gfJhfj/80419243149.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/XhecEjt/what_i_love_about_you_gift.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lebejos/58302155401.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/dovasufiwe.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 5408 bytes
SHA-256: bf699778c8d80578cf2f7f1877e34f0f8ec16372f50597968c1b62720ebe31ff
font_01_sfnt_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 5712 bytes
SHA-256: b71dd147492a2f9376a1185aad2b0a0ff23a0b8e7d3dd4d45740562ec99ee064
font_02_sfnt_off00011c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C25 11568 bytes
SHA-256: cebfdeb6df913d25b57069c373115f91f09e602158d6242e475f9d7d8713b639

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