Malicious PDF — malware analysis report

Static analysis result for SHA-256 977ddc92e3c5a2bf…

MALICIOUS

PDF

72.2 KB Created: 2021-04-30 01:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b90be1be290be860d8a5be2b40ca7c08 SHA-1: 8d4ff0df8b8cfa300fb2d5ccd7003bd1d6d2ca23 SHA-256: 977ddc92e3c5a2bf4a144baf00568544d43914752687c8d8a230a1c95476831f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a malware distribution chain. No scripts were extracted, but the PDF structure and URL patterns strongly suggest it's intended to lure the user into downloading and executing a secondary payload.

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://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/2i6c4latvn8o55u3s1jeh5mel7/52702390594.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ccfba10716ced975f1346a4c2095ba52/45601071828.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/5d8c1774535476bf869400d36f58ecea/78852928297.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/d87efa3fda8dda5dc15cc4db600be218/33236396694.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608303d80e1a6---14867619956.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607898cac2f4d---3931023188.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608781f408e1d---90716647331.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/cdc2b3f714967fb4d9e340835486d389/5192821544.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608646236eb02---tagowofisovi.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16088a99b5a798---pojabofivodan.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608405c0abb44---dabagef.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/281db45843d7bea75cc8bc2170141970/kawakanowipapusozalozo.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608590a36796e---78048667265.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160716ef7dd4f2---famasovufodod.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/aaff2b1d4a64977e38b5367e22fd7bda/kebudologisalanotixel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ages+in+history+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_off0000d153.bin
d2aa0e736eeaa7d01b3862d1459287a9fc8f1a81caa68e4e7d56a44589b55854		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 4940 bytes
font_01_sfnt_off0000e21b.bin
c36cd901d3e40a98e61c6ead36cc329e904df0c10586e2b3456652c4e4a5d470		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE21B 10648 bytes
font_02_sfnt_off00010614.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 4324 bytes

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