Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e20fe7d90d8183…

MALICIOUS

PDF

87.4 KB Created: 2021-02-26 06:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 205bc4f5e3f240ad9fdc781190dc588b SHA-1: ff117f5c8dbe069a10c676351e489ed4aea4ee57 SHA-256: c9e20fe7d90d81837d3117581b6f6f9f203d18b6d5505e76f5c1317632cf9411
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/award?keyword=english+grammar+check+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402520/normal_60302030946c4.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/2013_dodge_charger_leather_seat_covers.pdfIn PDF document text
    • https://cdn.sqhk.co/dilijenaka/gghaxdl/space_programs_all_around_the_world.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404293/normal_5febb57376aa9.pdfIn PDF document text
    • http://medway24.com/369141628444iyym.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/P3hfxjj/bovelonamaze.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/wd_tv_hd_media_player_firmware_upgrade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_601d846fb8367.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/is_there_a_reset_button_on_canon_printers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fdc5b3b722af.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/oxford_grade_4_maths_book.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/jgVjghg/pasero.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/fDvXWjb/duweruwofaju.pdfIn PDF document text
    • http://znasila.ru/diary_of_a_wimpy_kid_2020_new_bookc7uaw.pdfIn PDF document text
    • http://fringigejy.site/kugiresuta1dme8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5ff6a9f64f478.pdfIn PDF document text
    • http://8gusevshop.space/milady_barber_textbooki3v6s.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/gonafoziguwewe/badrinath_telugu_movie_songs_naa.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/words_their_way_spelling_inventory.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/15619408101.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/xowupuwakosumepirilolena.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 5368 bytes
SHA-256: 413932ce58f9bd31fc379bd0d5efc5d368745161d2b3cbd910110e8ed1e35fb7
font_01_sfnt_off00012ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA1 10660 bytes
SHA-256: 1696a15c539c00e147eb2563b9eee9f917aaa6bd425ceea9211ab6344e8c0222

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