PDF malware analysis — malicious · 3adb1d1e890cec8d

MALICIOUS

PDF

79.4 KB Created: 2021-03-29 03:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23

MD5: ba6720face28c5026bfac0e67afa4742 SHA-1: 94c90a6a6074bf5cc6ba164a85ca2ac456754160 SHA-256: 3adb1d1e890cec8d5e131a06554c75b28abbec0b9b306572c4b6ea14d920e520

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. It contains numerous external URIs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://fokemale.ru/award?keyword=overhead+allocation+methods+pdf PDF link annotation
- https://cdn.sqhk.co/juvebuzizej/j9HAixT/temisut.pdfIn PDF document text
- https://perixezekawuxod.weebly.com/uploads/1/3/4/5/134504143/xuvit.pdfIn PDF document text
- https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/jotak-bevarefox.pdfIn PDF document text
- http://loletopuwiv.iblogger.org/detolaguxogajijoviwokibi.pdfIn PDF document text
- https://cdn.sqhk.co/wekajibex/qhhijh8/pound_near_me_open.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4412895/normal_5fdcc345c5daa.pdfIn PDF document text
- http://wapajojakazewi.iblogger.org/36444782050.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408853/normal_5fcac8e939d9c.pdfIn PDF document text
- http://fefosawixamuwow.22web.org/nefexawekodozotisozirufa.pdfIn PDF document text
- https://cdn.sqhk.co/putuziboki/qy8FCid/85346465868.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450733/normal_60338394263ec.pdfIn PDF document text
- https://sukowuxipimo.weebly.com/uploads/1/3/4/3/134318810/pavinulesa_gizonami.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4409243/normal_5fc90a845077e.pdfIn PDF document text
- https://marotebage.weebly.com/uploads/1/3/4/7/134712984/5152947.pdfIn PDF document text
- https://divowotekek.weebly.com/uploads/1/3/4/7/134759223/e7f9cec334c423.pdfIn PDF document text
- https://cdn.sqhk.co/saligoliti/8CS9VL8/easy_way_to_beat_flappy_bird.pdfIn PDF document text
- http://juxeribitu.iblogger.org/54341109520.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/nuxomigo/najajajodugedotifoguboka.pdfIn PDF document text
- http://nuvebuxuloruvux.epizy.com/candyland_board_game_rules.pdfIn PDF document text
- https://s3.amazonaws.com/tesasubawalozan/yahoo_deleted_email_recovery_form.pdfIn PDF document text
- http://xokopaxitake.rf.gd/breathing_underwater_full_book.pdfIn PDF document text
- http://vomalowo.epizy.com/nobakaj.pdfIn PDF document text
- http://tebubejusudigu.rf.gd/cognos_report_studio_if_then_else.pdfIn PDF document text
- http://marilineme.epizy.com/birthday_greetings_gif_free.pdfIn PDF document text
- http://nuzelego.rf.gd/banned_books_challenging_our_freedom_to_read.pdfIn PDF document text
- https://s3.amazonaws.com/duzexefemosaxe/chandamama_kathalu_stories_in_english.pdfIn PDF document text
- https://s3.amazonaws.com/getizar/10747040356.pdfIn PDF document text
- https://s3.amazonaws.com/numunenoji/thrombophilia_testing_guidelines.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f814.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF814	5480 bytes
SHA-256: `53f95922fe6d5c10affbca63d90671cebd12b32304c0e4382d9fab3300beadcb`
`font_01_sfnt_off00010a92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A92	10872 bytes
SHA-256: `16176c80c4bc8f5eca391faecb4f3f4f3ce65dd65868fecbe12020dbcffa3861`

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