Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf32726298112a3…

MALICIOUS

PDF

92.5 KB Created: 2021-07-22 07:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3abd34b4624e90f52f5e3bf3f2b4b660 SHA-1: c5ce0cb2dbb005a55a9d7c843712de03f63a51c6 SHA-256: edf32726298112a35f17c73bc8f691fd848903ee76cc31177f5a656420895b26
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated, but the presence of an external URI and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pistant.ru/square?utm_term=physics+for+architects+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1e998de666b25f234f852/1626466712257/99178238920.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79f6dcef4a49b3a9da8f/1626110454387/gauss_theorem_in_differential_form.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed9910c8312e4ee1de008b/1626183952459/37285832741.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8105ad1bf7105ccb9f74/1626112261756/xiwuzajogadutugi.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f5ad626837042f2cfc03ab/1626713443083/physical_activity_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f83f49cc3f8a3514ced27c/1626881865561/nopodudowodagadu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0cf9cde4abb1f439091c4/1626394524553/at_last_a_life_and_beyond.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f8ea946c04540b030d8cad/1626925716715/horse_racing_runners_and_riders_tomorrow.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f852544e03100db5d95bdb/1626886740311/rixefes.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f8de9c4d80571ef0f31a88/1626922652869/art_of_courtly_love.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f8d5dde4dd7f0655637e0f/1626920414266/all_i_want_for_christmas_is_you.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f12d3a7c30ad68c63f20df/1626418491021/the_effects_of_dehydration.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edbc68f468596c31ebbfde/1626193000914/jessica_chastain_jimmy_fallon.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5c7d3eff6ed7acc0f7040/1626720211200/cynoculars_virtual_reality_headset_and_remote_manual.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f7d80bf603c47074e90950/1626855435979/jevuvozogerunikinufipu.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f07c2fac785a4b5bae1872/1626373167622/rurefadawazigelopewi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f660a01cd2fa6887735283/1626759328789/39420485538.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010773.bin
446571f7bc478e20ed458f68d39e6c43841f7b2fa2c762dbbd468e4c3b4617fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10773 16984 bytes
font_01_sfnt_off000133c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133C4 16792 bytes
font_02_sfnt_off00014bdb.bin
b2e080e11b453b5160ccbda1f26f3673986676c91209bc51b6762ac9bbb58fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDB 10684 bytes

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