Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5c388aa8fab22b…

MALICIOUS

PDF

78.5 KB Created: 2021-03-15 03:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2a330c1ad41e459401b89aaa038e6058 SHA-1: a16dd320e8bc3766924a81e702b57226c6505548 SHA-256: 9b5c388aa8fab22b4fbafb24ff2cf341c62969bd306625bf3f7306e80882ebee
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one, 'https://dugedepap.ru/wix?keyword=sudan+iv+test+for+lipids', being actively suspicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a deliberate attempt to create a link farm on disposable hosting, likely to obscure the true destination or to distribute malware. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/wix?keyword=sudan+iv+test+for+lipids PDF link annotation
    • https://bazuxenulasiv.weebly.com/uploads/1/3/0/7/130740357/sapapalo.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/40196463525.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/body_pump_workout_routine.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/army_regulation_headphones_pt_uniform.pdfIn PDF document text
    • http://ketorebagibof.22web.org/mopufeziwogogixaf.pdfIn PDF document text
    • https://bojepelesu.weebly.com/uploads/1/3/5/3/135350442/0c40cab57b20b5.pdfIn PDF document text
    • https://liritetujom.weebly.com/uploads/1/3/5/3/135310948/b63b7.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/pobewiragesefidu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/positive_effects_of_volcanoes_on_humans.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/roxeziv.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/87088435022.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/how_to_set_a_citizen_navihawk_watch.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_d95b6ef902934dd09bfb36534837d7a7.pdf?index=trueIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_25b5f7cc6372419ab95a9efdd7d14903.pdf?index=trueIn PDF document text
    • http://xologikaju.atwebpages.com/what_is_quantum_jumping_techniques.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/sedirejipobemagiri.pdfIn PDF document text
    • http://sasilefup.rf.gd/73863931053.pdfIn PDF document text
    • http://vobuluga.rf.gd/59149096944.pdfIn PDF document text
    • http://zumepif.rf.gd/film_architecture_101_full_movie.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_aa3683856b2346a4b072729d9b0153aa.pdf?index=trueIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/65246901278.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_add614c777564797901064f970006002.pdf?index=trueIn PDF document text
    • http://getidevip.epizy.com/bk_precision_8601_dc_electronic_load_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/android_code_to_transfer_files_over_wifi.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_off0000f479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 5200 bytes
SHA-256: 58c48b4fc1127581bf30a745f1a910038463f43886a8670b24b3219d590d2012
font_01_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 11548 bytes
SHA-256: cdcf2571586c6cad76ec396c3c708c909c9d6799878ee186cbf2b90e32c0ddc0

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