PDF malware analysis — malicious · 93458f820743b509

MALICIOUS

PDF

74.6 KB Created: 2021-03-19 21:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 06cecbb22ee6278b65fcdcfccb41197b SHA-1: e1c1a2e52392485c153985c43a4247cd5df6d0eb SHA-256: 93458f820743b5090a2764e6fc85a3fc333a3def7fcdfbd18747801dd3093c33

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially obfuscated, contains text related to 'ulcerative proctitis treatment guidelines' and the authoring application 'wkhtmltopdf', suggesting a lure. A critical heuristic identified an external URI pointing to 'https://druttle.ru/123?utm_term=ulcerative+proctitis+treatment+guidelines', which is likely the primary payload delivery or phishing endpoint.

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 https://druttle.ru/123?utm_term=ulcerative+proctitis+treatment+guidelines
- https://cdn.sqhk.co/busumodofu/hcwhg4t/41278048703.pdf
- https://cdn.sqhk.co/pefisemise/SNHUjiT/10491881791.pdf
- https://cdn.sqhk.co/lojosewude/ie0ZjfF/buzitegu.pdf
- http://madewithsunshine.com/jevufazawitub45a.pdf
- https://cdn.sqhk.co/josipinu/P0gc8gf/epson_iprint___windows_10.pdf
- http://wekeb.space/302118949243zyb7.pdf
- https://cdn.sqhk.co/binebelezux/hiO6hLq/astronest_the_beginning_guide.pdf
- https://cdn.sqhk.co/makafabakuna/epjgbPs/vegetable_chop_suey_recipe_with_cabbage.pdf
- http://groby-ritual.online/gutekabulesivufumoma3ss9n.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/turip/best_quest_guide_addon_wow_classic.pdf
- http://sovogezo.atwebpages.com/ac_sweep_pspice.pdf
- https://s3.amazonaws.com/xokebore/pajegan.pdf
- https://s3.amazonaws.com/jebokizez/33885482554.pdf
- https://s3.amazonaws.com/foneniz/67915782117.pdf
- https://s3.amazonaws.com/zemunomipazikez/civ_6_guide_england.pdf
- http://ropupifalapoges.atwebpages.com/zolufutosutegewa.pdf
- https://s3.amazonaws.com/fevobelijogal/flirty_good_morning_texts_to_send_a_girl.pdf
- https://s3.amazonaws.com/xuvamuba/free_download_30_juz_alquran_mp3.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_off0000e43f.bin` `07c8c07676ea45c9c26c115dc614555db76d0a2f7a6f611768b69dd1c8cbc575`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE43F	5444 bytes
`font_01_sfnt_off0000f6b3.bin` `1e8d54bb5421b86ee1b5cb827572680361085121f841f882df0d36da04e9b1aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6B3	11524 bytes

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