Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fc76f5c1e02095…

MALICIOUS

PDF

84.8 KB Created: 2021-04-13 15:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aecba933d54199c29f70c599bffd467 SHA-1: 12f24cc478a6ed6182cad20b6a7c6e7a17df5e2f SHA-256: 72fc76f5c1e02095491d13e5c1f4715f34cd4e0928a2dd0d7163acc28aa2e291
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The document body, though heavily obfuscated, appears to be a lure related to product searches, consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=where+to+buy+all+american+pressure+canner+in+canada
    • http://tersq.fun/10834101371cpkoo.pdf
    • http://epipog.com/46475464573o386o.pdf
    • http://job-finder.space/4899388499yjvod.pdf
    • https://cdn.sqhk.co/wepurodapike/47Pjbhe/59960047545.pdf
    • http://bioforcecolumbia.site/what_are_examples_of_cooperative_learning_strategies6yn5x.pdf
    • https://cdn.sqhk.co/givefugonuw/gnphgfo/ravuzulejokesun.pdf
    • https://cdn.sqhk.co/lezebulodiw/ie5if1R/xowulufiwutewub.pdf
    • http://lefibipefazefep.mypressonline.com/ridapowepa.pdf
    • http://sks-expertiza.ru/what_is_in_chick_fil_a_waffle_frieseu8j6.pdf
    • https://cdn.sqhk.co/nafusomo/gcF4fxA/53330708395.pdf
    • https://noxesole.weebly.com/uploads/1/3/4/6/134615833/31c64c9823.pdf
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/rofopifamobude_powevoxuboxave_xuxofedapa_gekef.pdf
    • http://getyourscore.info/how_to_fix_screen_on_toshiba_tvdfp48.pdf
    • http://fitokaps.xyz/vovonifirafibo1vsk8.pdf
    • http://texoraw.sportsontheweb.net/79982258730.pdf
    • http://docita.fun/pajesotetugatarusibilufewand09.pdf
    • http://mofemaruwek.sportsontheweb.net/the_secret_garden_full_movie_1949.pdf
    • http://tepugorotewole.medianewsonline.com/4073170776.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_a80fe98cb0814367868b5925cbdc60ae.pdf?index=true
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_177cccd09aec4118a7bfc496f4347fb5.pdf?index=true
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_11096267fe3e46ca9de3d094cac0ea4f.pdf?index=true
    • http://gegetebipa.atwebpages.com/keto_recipes_free_download.pdf
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_7fcbcf23890a4d978f43751f6cc2d58b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010af1.bin
7434c8ab4db7366f509066426a1607ca0f95db57535b0231039eb38ce2378828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 5568 bytes
font_01_sfnt_off00011dc1.bin
881cb6c74121b45f63ae43b082b3136c12a768f773c8ced24d7d400545d948e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 11648 bytes

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