Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c03069d216048f6…

MALICIOUS

PDF

78.7 KB Created: 2021-04-13 23:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 966ff1853203e1835eb1d85821728558 SHA-1: 2fae5034a10ba85d4033723320f9e46bb727d933 SHA-256: 0c03069d216048f68f015d25e47eb0163b6bf78344828d2970ef11b120e78e4a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains text related to a book summary, which serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/strik?utm_term=fantastic+mr+fox+book+summary PDF link annotation
    • http://madoxorijegobe.sportsontheweb.net/51463035147.pdfIn PDF document text
    • http://gafabotipunofu.mywebcommunity.org/9281486874.pdfIn PDF document text
    • http://rumajasajobotod.iblogger.org/48121443955.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/lesson_8.2_skills_practice_answers_geometry.pdfIn PDF document text
    • http://surupumigo.mypressonline.com/75295024060.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/19920283642elnx6.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/starbucks_handcrafted_beverage_menu_malaysia.pdfIn PDF document text
    • http://doxalasi.mywebcommunity.org/zurotudakazi.pdfIn PDF document text
    • http://pisufixefonof.scienceontheweb.net/breast_cancer_project.pdfIn PDF document text
    • http://chunyoo.com/backgammon_free_lord_of_the_board_game_board5950b.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/marketing_communication_notes.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/41172519445.pdfIn PDF document text
    • http://blacklaser.ru/66603748135sr4s.pdfIn PDF document text
    • http://fitness1.space/34843469513f7uai.pdfIn PDF document text
    • http://ionatr.space/26085695507olw0x.pdfIn PDF document text
    • http://urolog.xyz/how_to_replace_electric_water_heater_elements3tjdi.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/kotaluxuzezerakes.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/eenadu_telugu_news_paper_free_download.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/the_believer_s_authority_andrew_wommack_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jamudux.epizy.com/39338621409.pdfIn PDF document text
    • http://lizavobamibo.rf.gd/95260920985.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/engineers_and_geoscientists_bc_practice_guidelines.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/98902433611.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/advantages_of_modern_technology_in_agriculture.pdfIn PDF document text
    • http://rafesule.rf.gd/duzinefidukodolow.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_off0000f614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 5324 bytes
SHA-256: 64711184e900044ad51774ebcbb695151ce74c2da7657c498f7e6b6e227fd6f5
font_01_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 10828 bytes
SHA-256: c4efec267eb685af771f8c78797f9cb316f19309b22ef758e300110095cd826f

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