Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4362c5ebe5c695…

MALICIOUS

PDF

85.3 KB Created: 2021-03-18 03:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f267e0e6f1d7fe3590bb4db717a2e6c2 SHA-1: 54d52f97d08312af481eb158200f52f4f4d3eb69 SHA-256: 8a4362c5ebe5c695187ef2738d3b12831c55691ec83c1d61bc4ddea01b276b92
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://xajibur.ru/wix?keyword=circular+flow+model+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473388/normal_604f797d6cf4c.pdfIn PDF document text
    • http://playmarket-online.com/what_graphics_card_is_compatible_with_windows_10boc36.pdfIn PDF document text
    • http://instofficial.online/game_theory_101_william_spaniellbse5.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/who_manufactures_coachmen_rv.pdfIn PDF document text
    • http://egrn-order.online/perimeter_and_area_of_composite_figures_worksheet_answers4glf5.pdfIn PDF document text
    • http://1ux.site/820706707286x2g6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_600b6dd651afc.pdfIn PDF document text
    • http://usacreditcheck.info/15837858304hwrd.pdfIn PDF document text
    • http://idealslimitaly.site/paul_hardcastle_song_19_lyricsp9icv.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/fitafaxi.pdfIn PDF document text
    • http://trysucre.pro/kunujijizewidowavajexyoa.pdfIn PDF document text
    • http://boost-shop.xyz/is_boston_market_good_for_youi0jwx.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
    • https://s3.amazonaws.com/nufidibodudulad/bullet_journal_ideas_for_beginners.pdfIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_21c0236d66d3499eb769588c0aa44452.pdf?index=trueIn PDF document text
    • http://gegilifopom.myartsonline.com/96355504583.pdfIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_6967b38bcb7a4dd7917da11140936c8a.pdf?index=trueIn PDF document text
    • http://dilutibu.onlinewebshop.net/lutapebupevefukedupoponox.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/smart_alarm_clock_premium_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10089 5216 bytes
SHA-256: a6a3f1e29b5862faa7ede8cdd22954b60e2a95ce8adc699d3cdc13769e0c356e
font_01_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 11108 bytes
SHA-256: 48fd22a5f44cd172df7dcfb248d60d50820d1c02b4a92efbc61d74de66dabc6a
font_02_sfnt_off0001380e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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