Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93a703e85bafe7d…

MALICIOUS

PDF

95.4 KB Created: 2021-03-30 16:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a58a85651b87bc84002a62a4aa7fd3cd SHA-1: d6a6ed4978d2690faaa77928089549936c8bf9c9 SHA-256: c93a703e85bafe7dc83252fc6f66de34f1cf4696a6c5f404d210ca7aec602f72
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. The document body, though heavily obfuscated, suggests a lure related to bodybuilding, aiming to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=arnold+encyclopedia+of+bodybuilding+workout+level+1 PDF link annotation
    • http://manthoughtswebsite.website/agile_project_management_certification_south_africacpoa0.pdfIn PDF document text
    • http://donbetosstreettacos.com/mumebj73tz.pdfIn PDF document text
    • http://usacreditcheck.info/975099527970if6a.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/JzjhZgh/siduzupavubarari.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/juYR65V/fun_printable_math_worksheets_for_1st_graders.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/vjcicif/74558558149.pdfIn PDF document text
    • http://wbigs.space/critical_ops_apk_mod_2019s9eci.pdfIn PDF document text
    • https://cdn.sqhk.co/vakujediraw/fTjfkgg/hashtags_for_likes_for_instagram_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mozozezowos/hiCjbWd/bike_unchained_2_hack_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/box_office_2018_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/jidodaporipukon.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/lagu_bungsu_bandung_full_album_rar.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/78931892815.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/how_to_set_up_white_rodgers_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/trello_blog_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/90522314207.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/possessive_nouns_worksheet_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/71176300807.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/43731461547.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 5644 bytes
SHA-256: c7031d5a2cf3274e5ad9da796d29ca9fdbaf416eebb04e4fb523b3226ea88316
font_01_sfnt_off00013190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13190 11864 bytes
SHA-256: 4db5c2df9977fe2e8db2b04b7225eec602726fd6ccf9a5a4b8b981cbb681ba8e
font_02_sfnt_off00015a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A40 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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