Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd903be15d05ac17…

MALICIOUS

PDF

80.0 KB Created: 2021-05-10 23:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fbfc166a82a919b329a71e0bff54502 SHA-1: 7acce45e387a7f54f956a4b7a9ebf9f289d4bed4 SHA-256: fd903be15d05ac17c41462b8d680934d4f83cb8819632d029cbd4191bb51a1bf
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, specifically as a phishing trojan. The embedded URL in the document metadata, 'https://crophysi.ru/strik?utm_term=orion+cooker+recipes+pork+ribs', is likely the primary lure for the user. Although no scripts were explicitly extracted, the PDF structure and the nature of the detection suggest it's designed to exploit PDF vulnerabilities or trick users into visiting malicious links, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crophysi.ru/strik?utm_term=orion+cooker+recipes+pork+ribs
    • https://cdn-cms.f-static.net/uploads/4371800/normal_604638140c506.pdf
    • http://lisipezasuk.iblogger.org/fiwimowakazatukasukix.pdf
    • http://rent-nout.site/laser_quest_montreal_centre_villew08sm.pdf
    • http://mjawebdesign.net/lewis_and_clark_expedition_timeline_worksheeticyxy.pdf
    • http://1s.london/zuzaxwz7o5.pdf
    • http://usechambre.xyz/bodega_dreams_chapter_2_summary1o0wg.pdf
    • http://dusamoka.mywebcommunity.org/93005762049.pdf
    • http://yoga-fitness.space/pokemon_brick_bronze_randomizercrqqj.pdf
    • https://static.s123-cdn-static.com/uploads/4487187/normal_5ff2aadf62551.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fadadedezeker/apowermirror_full_version_pc.pdf
    • http://fafinonez.rf.gd/bomberman_classic_android.pdf
    • http://setojiwesurif.epizy.com/smarter_balanced_math_practice_test_4th_grade.pdf
    • https://s3.amazonaws.com/vabedafozo/difference_between_central_nervous_system_and_peripheral_nervous_system_in_points.pdf
    • http://laropijodozu.epizy.com/kakekojujesoxuxifo.pdf
    • http://wevoxefi.epizy.com/60102562991.pdf
    • https://s3.amazonaws.com/toguvaju/jar_of_hearts_sheet_music_free.pdf
    • https://s3.amazonaws.com/kitakilesa/31188247578.pdf
    • https://s3.amazonaws.com/wivunonovef/wobugunexulomamobe.pdf
    • https://s3.amazonaws.com/tezude/maytag_dishwasher_error_codes_f6_e4.pdf
    • https://s3.amazonaws.com/fukepez/my_pet_animal_cat_composition.pdf
    • https://s3.amazonaws.com/rodiligarexo/zaromi.pdf
    • https://s3.amazonaws.com/sirilagewuga/blank_handwriting_worksheets_for_1st_grade.pdf
    • http://nuwadolonopip.onlinewebshop.net/18461707378.pdf
    • https://s3.amazonaws.com/lofese/webuzozimuvitiwolejojefix.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbcf.bin
e27d554dd85c10c6d3eafd01c0acfc87240f29df21a44b7886e929e8f6f78cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 4916 bytes
font_01_sfnt_off00010c96.bin
4b71923c373f7ed1245b6cd68728fc389ef3c8e1e83cfa65c16924d89e64b86f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 11356 bytes

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