PDF malware analysis — malicious · c40f3c156a42cac0

MALICIOUS

PDF

77.9 KB Created: 2021-02-21 15:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4acf25ad78a2473a3c82deeff379b60d SHA-1: 248c9d27aa01ceef5af23497470e43bae57fb994 SHA-256: c40f3c156a42cac0e836886c761f73477054ff35b52c1ce0dcfadd359c79c274

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'druttle.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for creating malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://druttle.ru/wix?keyword=worlds+easyest+game+cat
- https://cdn.sqhk.co/posukomokufi/igciegg/69303871371.pdf
- https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/b411b182a3a5.pdf
- https://tevadurut.weebly.com/uploads/1/3/2/6/132682826/990dc7878fb.pdf
- http://pubedetavilew.22web.org/android_allshare_cast_dongle_s_w_update.pdf
- https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/4336341.pdf
- https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/rejerupuseni.pdf
- https://static.s123-cdn-static.com/uploads/4374369/normal_6000ae87de9fe.pdf
- https://cdn.sqhk.co/wisulekekij/cwaiFha/mini_obdii_car_diagnostic_scanner_software.pdf
- http://rigipufefe.iblogger.org/c._v_form_arabic_and_english.pdf
- http://vadukut.iblogger.org/equinox_flipfont_apk.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://fofuxolisemaxim.epizy.com/facebook_photos_original_resolution.pdf
- http://newabef.rf.gd/beresheet_hotel_images.pdf
- https://s3.amazonaws.com/fatikonavori/visosoxetokarutumole.pdf
- https://s3.amazonaws.com/lumixi/bovuzitatifugogoxafinef.pdf
- http://zenerunikojovo.epizy.com/riwosinu.pdf
- http://xatonerux.epizy.com/petazapiwurezajisevonexe.pdf
- https://s3.amazonaws.com/vazisi/que_es_un_proverbio_chino_en_ingles.pdf
- http://ruzuzis.rf.gd/university_of_michigan_dearborn_transcript_request_form.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f402.bin` `00d320bec750af3a82b971dd7754278a31cf96ad47000dd007349e6947abb3e4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF402	5372 bytes
`font_01_sfnt_off00010644.bin` `e11d2f99a02fec8cfd054625f4552b8e9b3402170be61db0f22b5ddccdc69d1f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10644	10592 bytes

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