Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6bf01be317c20f…

MALICIOUS

PDF

73.5 KB Created: 2021-03-01 14:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bf8783ddbba9209d3501ec5fbee6533 SHA-1: 28b77877f62b3b94dece03dd1e78ad342d66eb8a SHA-256: fa6bf01be317c20febbe51bf30c67f85d394600f2c77092aa7ae10e84b74f511
146 Risk Score

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 callback-phone (TOAD) 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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/wix?keyword=tv+guide+salina+ks PDF link annotation
    • http://hangookoil.ru/do_you_write_dad_with_a_capital_di63u7.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/gO2Ihj8/22661362235.pdfIn PDF document text
    • http://trysalon.xyz/what_is_nash_equilibrium_econ6q50a.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/ibjgid1/sewobisazininetegopomitug.pdfIn PDF document text
    • https://cdn.sqhk.co/nafolekuge/jid7pje/samsung_level_box_pro_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/jgitJgn/idle_ship_tycoon_port_manager_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/gjiijwB/melt_chocolate_in_bowl_over_boiling_water.pdfIn PDF document text
    • http://freds.space/mamupovu26xkg.pdfIn PDF document text
    • http://hellesypakk.online/telewekqs9jj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeburam.epizy.com/oxigen_wallet_app_free.pdfIn PDF document text
    • http://remofexemuja.rf.gd/real_cricket_19_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/lunupemesidoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/castor_informatique_resultat_2017.pdfIn PDF document text
    • http://zixupikitudid.epizy.com/zifidorofo.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/vujaroku.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/casio_g_shock_tough_solar_set_time.pdfIn PDF document text
    • http://pazipinabobon.epizy.com/79929089700.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_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 4968 bytes
SHA-256: 7fe249acf188298330a8ea0335ec3eec16b252ca2c6a3a28bb6d019c7ea3f68f
font_01_sfnt_off0000f1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B0 12204 bytes
SHA-256: d03e9b3d6d97563f9bf2901d07c9d8e529621b6d3fc685df947ac8487e9f77a1

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