Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d3928c0be7b3d3…

MALICIOUS

PDF

77.8 KB Created: 2021-03-13 20:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 208f31a3d7cfa5c0ee4412298a8f02d9 SHA-1: cec9150e4333c6e67080c3ef8b438e8803c7f580 SHA-256: 00d3928c0be7b3d3d86043a864f377a1efcab616a0134eef188773d523983cb5
126 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 numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to free downloads, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/award?keyword=neet+biology+notes+pdf+free+download PDF link annotation
    • http://paxejunon.mygamesonline.org/vanilemisozodulubusixavug.pdfIn PDF document text
    • http://setafugeridol.scienceontheweb.net/db2_sql_queries_tutorial.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/how_fast_does_the_honda_talon_1000_go.pdfIn PDF document text
    • http://bigswinner.space/87234913120wlz6u.pdfIn PDF document text
    • http://noxavikadovul.mypressonline.com/pimatifavejekudedomani.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/how_do_i_reset_my_lg_linear_compressor_refrigerator.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/pjieijF/fire_emblem_heroes_characters_by_release_date.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/48726435020.pdfIn PDF document text
    • http://creampiepow.club/lenovo_y500_laptop_price1tiv0.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/12_disciples_of_jesus_christ_and_their_background.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/twilight_saga_eclipse_full_movie_mp4_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/iahe4YX/60146041535.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/iakijRL/13200388122.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/dunkin_doughnuts_iced_coffee_nutrition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://goniwenu.rf.gd/cardiopatias_congenitas_pediatria_2020.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/59111043684.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/tailor_professional_sewing_machine_parts.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/indian_mythology_books_to_read.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/sudetunev.pdfIn PDF document text
    • http://xofemamerisip.epizy.com/for_cause_and_comrades.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_off0000ee78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE78 5512 bytes
SHA-256: 8f0a39392a3be808061c7b25c8c12f04b11a21a29e5436413eef1a5ab69ea219
font_01_sfnt_off00010160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 11356 bytes
SHA-256: 10d06281d8ebb48e89a43a85c80feb2bd8456ff7154e5c6fe393cbcbbc10d469

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