Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd35335eb95ed20…

MALICIOUS

PDF

120.7 KB Created: 2021-03-05 03:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2b05acad1eed0554ddb3a262cdb37823 SHA-1: 72c717324961a00fcafd2653b0ae4c0e285182d4 SHA-256: 9fd35335eb95ed207a9906883c94d73b025629ba41278b83e0f4078ada5e4b59
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/aws?utm_term=mental+concepts+or+templates+that+intuitively+guide+our+perceptions+and+interpretations+are+called PDF link annotation
    • http://kedutugadow.iblogger.org/19326013689.pdfIn PDF document text
    • http://triple-doska3.club/62069654366n4z52.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/jjhdjaS/crossword_puzzle_apk_free_download.pdfIn PDF document text
    • https://jitosagar.weebly.com/uploads/1/3/4/3/134318128/levixaz.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/how_to_fix_gas_knob.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/zaferotenewomokawav.pdfIn PDF document text
    • http://metalllift.ru/6958453547509lau.pdfIn PDF document text
    • http://replyua.site/ambili_malayalam_song_freezvptk.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/organizing_quadrilaterals_worksheet_answers_mathbits.pdfIn PDF document text
    • https://dumamawikop.weebly.com/uploads/1/3/0/7/130740251/4300e48d.pdfIn PDF document text
    • https://cdn.sqhk.co/wejewenu/gjbnq1y/redbubble_the_forest_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/hgfZiah/25047628478.pdfIn PDF document text
    • http://dkblogin-de.best/jefubimujowuxezuzaweji9jfvu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/63281819026.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/46308445260.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/ue_boom_2_speaker_not_charging.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/vusorovenasesef.pdfIn PDF document text
    • http://jopumogezev.epizy.com/woodrow_wilson_public_administration_upsc.pdfIn PDF document text
    • http://nenedabex.rf.gd/pababilorozoxujukenokux.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/top_c_interview_questions_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/exercises_on_all_tenses_with_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BAD 3008 bytes
SHA-256: a7f76e580153fa933b5696c5999723b42596efc40a6f33c9fa11c5f21406e3b3
font_01_sfnt_off00019676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19676 5656 bytes
SHA-256: dc48b745041fee178b3f0081ce597dc40c677d71e05ddd5dec2027033e97fc45
font_02_sfnt_off0001a9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9A3 13264 bytes
SHA-256: 3f20580e8ce7e8a19082e58b47061b6b7ff90b1b924180da299d21fd617a633a

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