Malicious PDF — malware analysis report

Static analysis result for SHA-256 353e5eaef7198674…

MALICIOUS

PDF

80.1 KB Created: 2021-04-07 09:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9a25e613128697c1a8db2df38e0ba3f SHA-1: 07b9ebf8a1b31369cd9e32a7d4b12ac34346cc11 SHA-256: 353e5eaef719867413b12475a22b98fd09ea36762127ccab01abe535e195b954
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were directly extracted, the PDF structure and the presence of external URLs suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=symbiotic+relationship+worksheet+doc
    • http://falufob.iblogger.org/vudoxizuvifunuvapufewebuz.pdf
    • http://lojapidabud.mypressonline.com/mamibilufajifawirelibije.pdf
    • http://dusibarupuguli.medianewsonline.com/how_to_write_a_book_easily.pdf
    • http://gapijet.scienceontheweb.net/99593165838.pdf
    • http://dirozigumifew.scienceontheweb.net/persuasive_essay_topics_for_high_school.pdf
    • http://bukuxojunuz.mypressonline.com/tenapokibogodaxavup.pdf
    • http://muzibatixabu.mypressonline.com/income_approach_definition.pdf
    • http://labifovejes.mypressonline.com/80061354077.pdf
    • http://duwinijuj.mypressonline.com/twilight_breaking_dawn_part_1_full_movie_watch_online_fmovies.pdf
    • http://sabumow.mygamesonline.org/filalejadiduzigidu.pdf
    • http://pakunobun.getenjoyment.net/12th_zoology_book_in_tamil_medium_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/272fb588-317f-42c6-b9e1-97018389d024/koxutiboku.pdf
    • https://uploads.strikinglycdn.com/files/9283dbb2-f3df-4312-85d9-7984ab717771/beethoven_5th_symphony_piano_sheet_music_easy.pdf
    • http://dabixuri.rf.gd/91947663029.pdf
    • https://uploads.strikinglycdn.com/files/f45e6bbd-8acb-47cd-ba84-ae13e0b8e62c/nojetig.pdf
    • https://uploads.strikinglycdn.com/files/81542af5-b901-442d-a27e-2782068651dc/wekitefixe.pdf
    • http://seretavezoduriz.onlinewebshop.net/wutilurewelidibuwab.pdf
    • http://zodiripek.myartsonline.com/87388776402.pdf
    • http://fukewabukitiv.epizy.com/jezizonopufififovix.pdf
    • https://uploads.strikinglycdn.com/files/0897a722-baa8-4b50-9ab8-2d32dfe34057/61823662858.pdf
    • http://kapirexazi.onlinewebshop.net/60022268269.pdf
    • https://uploads.strikinglycdn.com/files/2e82da73-fd4b-43e0-8223-15741de08d68/lakshmi_narayana_stotram_in_telugu_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/cab25fd3-f4e0-4be4-8b0b-ea5906206452/the_road_within_movie_watch_online.pdf
    • https://uploads.strikinglycdn.com/files/d1b6ee7d-c04b-4798-90ce-be3b9c6c8c48/64750700987.pdf
    • http://vidoniwofunevan.onlinewebshop.net/zazazuluwiwarajovega.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_off0000fbef.bin
f888a644e8f442a416d7b144dc6076feb8c655097fce4a25e643ca3ecd4adfc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 5812 bytes
font_01_sfnt_off00010fa0.bin
8b1693eb26f9bf98d95485cb427dff25e5acc7ebcddf6317cbc0dff033373000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA0 10220 bytes

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