Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd65c52504fd2cd…

MALICIOUS

PDF

72.4 KB Created: 2021-04-01 21:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f2217646fe52ecc6215700ce350ed83e SHA-1: 8f62d1f7a607fc8617acc7372a90c4a559f951e1 SHA-256: 0bd65c52504fd2cd80b40a3259a96f506ac2d30686bc9fafbfe5b1a89b28f79d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to reference a manual, which is a common lure for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=cateye+cc-mc100w+manual+espa%25C3%25B1ol PDF link annotation
    • http://storedubai.shop/catholic_mass_word_search_answers78god.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/zULRhgd/gibuzer.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/barron_s_gre_book_17th_edition.pdfIn PDF document text
    • http://mattelipsticks.site/wh_family_words_list2tbm3.pdfIn PDF document text
    • http://xrootunited.com/anime_twist_apke7wxh.pdfIn PDF document text
    • http://bekavukida.22web.org/system_dynamics_solutions_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/bDibChe/sound_of_silence_cello_sheet_music.pdfIn PDF document text
    • http://mnclassis.org/sony_rx100_iv_user_manual_downloadpqpa0.pdfIn PDF document text
    • https://cdn.sqhk.co/tajaketo/BgeWiil/99808205273.pdfIn PDF document text
    • https://cdn.sqhk.co/rafujajek/j4RPhdq/25664946873.pdfIn PDF document text
    • http://italysummer.fun/62462166323n8eo5.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/bivulelopebewukubufive.pdfIn PDF document text
    • http://loberas.22web.org/allanson_neon_transformer_1530fpx120.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://papevubuzepake.epizy.com/international_cocktail_recipes.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/64961869449.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/99637508407.pdfIn PDF document text
    • http://butopam.rf.gd/36494821313.pdfIn PDF document text
    • http://papipafikumi.epizy.com/26004319317.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/zofuvepisavoxutuweloguju.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/ball_bearing_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/98102744613.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/saxogudaku.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/vigubipo.pdfIn PDF document text
    • http://vogepaxita.rf.gd/kosenafakowetagobegekeker.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_off0000da0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0C 5520 bytes
SHA-256: 6010553172478b83db842e116e81613406c1ebe9ee7768d896a9d535ba2add13
font_01_sfnt_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 11580 bytes
SHA-256: 24208cdd97066b9c10121daf878639382da6cd4c335f194df831a1bd6cf667ef

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