Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f30c377a8ef4b36…

MALICIOUS

PDF

72.7 KB Created: 2021-03-27 17:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cbd20d43f51c761268ebbf4d59d3e13 SHA-1: 7d7d2a9fd73941c78db4f1c059de9508ffbc51c6 SHA-256: 5f30c377a8ef4b368ac75af4cd553960260648f4c8ed2cde04ab88d7ce1556cc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that appears to be a lure for downloading a PDF, likely containing malware. The document body, though heavily obfuscated, contains text related to 'William s burroughs junky pdf download', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=william+s+burroughs+junky+pdf+download
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/topiwewawo-mukemiwisober-robivan-vibolomemolifuf.pdf
    • http://ufenmac.com/medieval_2_total_war_americas_unlock_all_factionsw3l77.pdf
    • https://vuloribogisoso.weebly.com/uploads/1/3/4/6/134655424/2707250.pdf
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/2370159.pdf
    • http://winoraama.fun/80218971155smeod.pdf
    • http://habirovradik.ru/jomoxajevekot0qfyj.pdf
    • http://usacreditcheck.info/what_is_a_trigonometric_identity_definitionejzhw.pdf
    • https://rurovipodi.weebly.com/uploads/1/3/4/0/134096689/rexedowepusuledogu.pdf
    • https://cdn.sqhk.co/molodomo/gjidkch/la_reina_del_sur_season_1.pdf
    • https://cdn.sqhk.co/rijujonakuje/hRJidvi/fataxiwukomugazo.pdf
    • http://arboozfilm.com/finatawudozuj79p4.pdf
    • https://cdn.sqhk.co/jabezoxujo/nhj4hgC/93563929558.pdf
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/purikejar.pdf
    • https://xagogijan.weebly.com/uploads/1/3/4/7/134720006/niwutexugumatuw-dizakugororirew-zorebinonat-tedikaregoxewa.pdf
    • https://zivotawab.weebly.com/uploads/1/3/4/5/134576919/1882570.pdf
    • https://cdn.sqhk.co/fekoguwiwu/6GiiKc0/wurebupafux.pdf
    • https://cdn.sqhk.co/tefivezik/ggVjaii/difonujapuzav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/38af9138-3733-454f-bf45-5bbb15681d52/master_cleanse_diet_recipe_and_instructions.pdf
    • https://s3.amazonaws.com/wegemebufojafak/btec_level_2_performing_arts_2010.pdf
    • https://s3.amazonaws.com/zexozavo/72915875077.pdf
    • https://s3.amazonaws.com/muwemivumazulax/zemixidebekorelixumonug.pdf
    • https://uploads.strikinglycdn.com/files/6526ab64-2fc6-42d9-b2eb-cd69074beff4/gem_of_the_ocean_symbolism.pdf
    • https://uploads.strikinglycdn.com/files/60d6b084-f7c1-4ab3-89b7-52517bccd9dd/different_types_of_lockout.pdf
    • https://uploads.strikinglycdn.com/files/8283f15b-dcbf-4f15-b82d-e8e6a3cf4b49/32574521899.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_off0000dc19.bin
ea2b59a941bceb6ffa3a428680dcfeecd22b0ae108434b67fb3000605e006876		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 5940 bytes
font_01_sfnt_off0000f04d.bin
a3ffc6e091c4eb554361c9841c879bd026f850bbe05f688c4784d43e0ebc3307		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 10904 bytes

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