Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dcd1343b1afc770…

MALICIOUS

PDF

71.5 KB Created: 2021-05-23 07:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17e71d465763051bfc1e949758fa14fc SHA-1: 97acfda582fca43b9e4f75f682291244e84ab069 SHA-256: 1dcd1343b1afc7705669c9421f0598c48112890945f7ff17ecb68ed5a66b1cae
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple unknown URLs suggests a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment. No scripts were extracted, but the PDF structure itself is suspicious.

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://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608feb2aa7598---jozifemexar.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/25283ffe2c98ac9e912f31e04a6940af/fifowapuligafigoji.pdf
    • https://aartipalette.com/userfiles/file/mapubexudazedezibawevidu.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8611a58eb---29582504303.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/1cdb39b712b859e70de0556838e8e4ae/95043134917.pdf
    • https://its-bulgaria.bg/files/file/tubagozevodit.pdf
    • http://birnagarcollege.in/userfiles/file/xunujepagonurof.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c2910fc36---78971734058.pdf
    • https://jodhpurtravels.com/nbloom/fckuploads/file/56452476122.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c66b211cbb---25409350174.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/459af920fbe42554682b9d452d73db3f/zezadoremun.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/2f8d5d322b3cf35e21a458a1f42803a4/77420591011.pdf
    • https://chmelo.hu/sites/default/files/file/mimipusimidaz.pdf
    • http://asiavent.com/UserFiles/file/%5C/9141197913.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/71628a5c58197cfb75c60e3697a13cbd/milukudolibezupisuka.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3433a435d3---tofozufexisiviti.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ff3d7a564---85563122990.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=2015+mercury+60+hp+outboard+owners+manual
    • 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_off0000ccb8.bin
4917e52b351d6618f10faf6780c2669cf5362993b368a5b0f1064dc2f0f08121		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB8 5992 bytes
font_01_sfnt_off0000e0f4.bin
eed2445bbd49f711000b669fc989f53e6925976672e047acdbf09bb6e013d332		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F4 9768 bytes
font_02_sfnt_off00010244.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10244 4324 bytes

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