Malicious PDF — malware analysis report

Static analysis result for SHA-256 765d6f2d66626ee6…

MALICIOUS

PDF

87.8 KB Created: 2021-05-11 21:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 300ef75792a78c23312cbe3e293dcb6d SHA-1: 91acb46a10ba98c6b232ca2bf1c60ab4bcb25985 SHA-256: 765d6f2d66626ee606b3510ca02b1725a50d56e2d0da95e498aa414894d5b45e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of multiple external URLs further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=letania+del+rosario+de+difuntos
    • https://wowajonaj.weebly.com/uploads/1/3/4/7/134717857/dd858ec.pdf
    • https://cdn.sqhk.co/jowapezo/hdAgiTC/prepper_food_storage_containers.pdf
    • https://cdn.sqhk.co/sebazisop/hfIgiji/baxakajekevifuxu.pdf
    • http://idealicaitalia-official.site/xotavoturojartwwl.pdf
    • http://shop-you.xyz/king_air_c90_training_manualkalsk.pdf
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/mamepufazopo.pdf
    • https://cdn.sqhk.co/vulovosovem/jcFjejh/getopekikupomafakux.pdf
    • http://smm-target.ru/what_is_a_split_sentence_in_alabama013rb.pdf
    • http://parralax.net/tiganakevexisabikudebebnvalb.pdf
    • http://shopbest.online/what_is_plt.legenddtiyn.pdf
    • http://hookup673.site/bibixaverarufuxewpz62s.pdf
    • https://cdn.sqhk.co/ritafase/iicgfih/24392278610.pdf
    • http://gnatural.space/warm_bodies_2013_full_movie_in_hindiqraip.pdf
    • http://mokenolovulonom.medianewsonline.com/fakemabibulirakisokises.pdf
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/5682280.pdf
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/953132.pdf
    • http://xanusojuruxu.sportsontheweb.net/carte_du_monde_vierge__imprimer_format_a4.pdf
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/1894907.pdf
    • https://cdn.sqhk.co/fofotixoz/aqKgiji/gowuxekosasukarixolasume.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7dadb221-427e-492c-87d0-c86fc337d941/the_study_quran_book.pdf
    • https://uploads.strikinglycdn.com/files/f2c9e128-0038-4a59-8860-fa405440a8f0/92578384712.pdf
    • https://uploads.strikinglycdn.com/files/f494a7ba-94a3-4893-a812-6d508fdfa1e5/what_to_get_your_godchild_for_their_christening.pdf
    • https://uploads.strikinglycdn.com/files/f0742957-26a3-4d3f-bc7a-59296069eb22/girl_interrupted_book_characters.pdf
    • https://uploads.strikinglycdn.com/files/2ef93d7d-76ee-401e-9f16-685c3da1ecd2/how_to_track_international_registered_mail_usps.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c8b.bin
8747f2b1e841265367d1766ddb02520e2fe3ec38c42bd695d96e008e1c519dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8B 4724 bytes
font_01_sfnt_off00011c9d.bin
723b54ffe965fe45740d3a09a110e0ee4851f6bf0ce68a185d1a68734c8c26b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9D 11808 bytes
font_02_sfnt_off00014212.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14212 4324 bytes

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