Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e66c4b3a574dba…

MALICIOUS

PDF

75.2 KB Created: 2021-05-27 16:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35735e2223b8606f2a0650f8a649e3c5 SHA-1: d26a274ef7a735d62b251e2dcd982b821cb8297b SHA-256: 83e66c4b3a574dbac68ea9e94f8f2257d4b546cf6e0ff497e4232ae4e301d7dd
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs suggest the document is part of a phishing campaign, likely attempting to trick users into downloading further malicious content. No scripts were extracted, but the presence of multiple suspicious URLs points towards a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7287d2302---xejixobo.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072b56499cd1---xorovaraba.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/4bhmr2fdb2dc9h7d509jl95np5/navufikapirawimatavavax.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16073342b92bfb---68015808506.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de1d1ac395---xedapotirudawowapibo.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074d63a392c8---duwivek.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/92q1civ2havfiq022lpmehsr25/losuferokef.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090dd9f7d5c9---95598634172.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/024275c0c0612733e12906cbd2d9d9aa/kazodusadenetisuzevariwu.pdf
    • http://jrpst.pl/userfiles/file/dodikavoruju.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e941ad2cf8---bizufazixutunuber.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/eb26cda90024f15b2ff61d23366ab99f/rotomuwevarozezubetuju.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b552b151a0---fiwataribipomebepeve.pdf
    • http://diversecityuk.com/userfiles/file/sefefuxetezovakexo.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160802f44b8255---14386938607.pdf
    • http://www.bluewhaleline.com/image/upload/File/16303379260.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608444910e725---rekewanisowuzofuduva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=staff+of+corruption+schematic+dragon+age+inquisition
    • 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_off0000e5e1.bin
f62b04b2bb36742d6af77adf8d66adf8adba7920dc523e0d37119b79e6da128c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E1 5764 bytes
font_01_sfnt_off0000f94f.bin
0176ad18e13b5781b62a9478df3a5f1f1e1870377c359697b435a5c5041033bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF94F 11180 bytes

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