Malicious PDF — malware analysis report

Static analysis result for SHA-256 736674cd9909bad6…

MALICIOUS

PDF

77.1 KB Created: 2021-03-14 05:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 071a97416d3818afd9c66f7ab27da4bc SHA-1: 8cbf11c49cd354e2bd8641953d8fa783a569b08c SHA-256: 736674cd9909bad66be0cfc968d5e2268c9b23ba02022b405f5da5f990a72130
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document's purpose is to act as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=the+spectacular+now+%25282013%2529+imdb PDF link annotation
    • http://moymagazin.xyz/jelidazifucd.pdfIn PDF document text
    • http://idealicaitaly.site/521031459801hysw.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/9296614.pdfIn PDF document text
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/5723290.pdfIn PDF document text
    • http://wafenov.iblogger.org/dureli.pdfIn PDF document text
    • http://madewithsunshine.com/11839807325wgp5j.pdfIn PDF document text
    • https://velonifiwivuli.weebly.com/uploads/1/3/0/7/130739758/vafux_fisifapokurikad_gomirotubi_mutumonixuvovo.pdfIn PDF document text
    • http://mopotiboxa.iblogger.org/tetutegitizat.pdfIn PDF document text
    • http://giocodigital.space/vocabulary_workshop_level_f_enriched_edition_answersqpvob.pdfIn PDF document text
    • http://ru-payment.casa/690083271015stsz.pdfIn PDF document text
    • http://wezenilokiwuv.iblogger.org/89677936330.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soxomidil.epizy.com/rapafusaravutaxirurome.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/15417281037.pdfIn PDF document text
    • http://zivufev.rf.gd/what_does_devil_take_the_hindmost_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a0a712-ab1f-43fa-8561-4264816936ff/longman_american_idioms_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ca031c-0435-4aa3-b6bc-cbcd5171a42e/how_to_add_html_on_wix.pdfIn PDF document text
    • http://falogivaxaf.epizy.com/gowotabil.pdfIn PDF document text
    • http://mopezuvo.epizy.com/ahan_inna_ahagena_inna_mp4_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5960b1-7e67-44cc-990f-feff2186af7b/womens_air_force_1_pixel_white_black-sail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497d8c18-9b03-4680-98a3-ccd9e12d133c/itil_service_strategy_sample_exam_questions.pdfIn PDF document text
    • http://pelubameta.epizy.com/62382858668.pdfIn PDF document text
    • http://dejogamolefip.rf.gd/math_coordinate_plane_picture_worksheets.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_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 6136 bytes
SHA-256: e40f7c56ee9242e426e3736d03755184945c44d625e8b38d51d5e276b086dc3c
font_01_sfnt_off00010056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10056 10848 bytes
SHA-256: a9e69017f880b8f7d17aecf218ba3371330a1771c79c773302eb36d2758d722a

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