Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5da1ae27e5e26a8…

MALICIOUS

PDF

79.6 KB Created: 2021-04-17 00:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a745de366a1728e706fd926a09ed037 SHA-1: 7bf9f3c61c0341a46e1067347fd7d6ba3c58e7ac SHA-256: b5da1ae27e5e26a8f0d56fa31576312537e1ef3e2cb6b5e844102cfcaba6ca56
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://ponafet.ru/strik?utm_term=what+is+max+bears+net+worth
    • http://ketorebagibof.22web.org/song_of_solomon_quotes_wedding.pdf
    • http://ilkertr.shop/14357391036iwfv.pdf
    • http://xugejujivekivu.iblogger.org/difference_between_bacterial_and_viral_tonsillitis.pdf
    • http://fazojum.66ghz.com/nerovinimewegolegi.pdf
    • https://cdn.sqhk.co/xejudawadoni/eNifH1I/73267877455.pdf
    • https://cdn.sqhk.co/sevigexew/0gLhahf/narimodabir.pdf
    • http://getcabinets.xyz/creative_sound_blaster_x-fi_surround_5.1_pro_usb_audiobzwi9.pdf
    • https://cdn.sqhk.co/kaxejelun/chihsje/land_rover_off_road_experience_skipton.pdf
    • https://cdn.sqhk.co/tajugajobib/JvJjcig/designer_cake_shop_near_me.pdf
    • http://parralax.net/5431969588os9fg.pdf
    • https://cdn.sqhk.co/vitimosugu/Lgjfgg8/switchblade_knife_lighter.pdf
    • http://profapp.pro/tazizixinatojo8zf37.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_a4a81423354a4190bcf10d3c5c10baf0.pdf?index=true
    • http://sirowozikuko.epizy.com/pusejixemivupogijivot.pdf
    • https://uploads.strikinglycdn.com/files/83252e8c-6bbb-4af8-98af-238e26dd3e37/pulevulolizijezisipe.pdf
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_3a36218832854d49a261029074363aa2.pdf?index=true
    • http://fujebudavitasoz.epizy.com/epl_transfer_news_bbc_report.pdf
    • https://uploads.strikinglycdn.com/files/72af0c6f-c6a5-4554-9289-ef4f134d46da/karanapitiba.pdf
    • http://losojotatilo.epizy.com/hadith_bukhari_urdu.pdf
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_f55de9eb812848f99b043bb82e537089.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d2f602ff-c765-45d0-8ba4-481f0ead6278/lesson_before_dying_themes.pdf
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_efe8e91a93b64bd2a6c4cb0f30aa80d4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/be412a7b-cab3-45f2-a0a5-393be067afb0/jilebujejozobiko.pdf
    • http://fovenipeder.rf.gd/namakam_chamakam_in_english.pdf
    • http://webenawawejoped.rf.gd/93637610123.pdf
    • http://sizuzupapefapo.epizy.com/acas_managing_gender_pay_gap_reporting.pdf
    • https://uploads.strikinglycdn.com/files/21506e0a-9920-44d2-a10f-640734ac3c2f/9849116396.pdf
    • 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_off0000f94a.bin
af67337e3f53f5de7d3c413ae81683faae15802192c010de9e3a4f670a5c6758		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 5208 bytes
font_01_sfnt_off00010aee.bin
2bf62f5abe0b8cababcb47d42b146127de09bc1a26481cb41561eb4ab683cc64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEE 11060 bytes

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