PDF malware analysis — malicious · bc12d72e461c043f

MALICIOUS

PDF

96.3 KB Created: 2021-03-12 07:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: ba983d52b8de9c0dff853faa2629458c SHA-1: 9f92bad2d959274b29e7afba89371d477915ab49 SHA-256: bc12d72e461c043f8c9d7dd324f264ead706b18f3a2a1bcdd7f53a8972b9690f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to 'supply chain PDF' and is generated by wkhtmltopdf, a tool often abused for malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://maypoin.ru/award?keyword=cadenas+de+abastecimiento+pdf PDF link annotation
- https://cdn.sqhk.co/rijakobebux/lEijgKr/mud_bogging_events_near_me.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425759/normal_600b65ae6e510.pdfIn PDF document text
- https://cdn.sqhk.co/sativomofij/Sjhhjp7/piggly_wiggly_store_in_wautoma_wi.pdfIn PDF document text
- http://keligekixebar.22web.org/video_introduction_templates_free.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446165/normal_600f1c72b81da.pdfIn PDF document text
- http://renijulemigato.iblogger.org/wunetaw.pdfIn PDF document text
- https://cdn.sqhk.co/tafolaku/gcjfuhd/88201308157.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392199/normal_603f487f32240.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://kenewemugine.epizy.com/toxilibuvamukive.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d42c5f9-d6d2-4e2d-b206-7e537821bac8/jolite.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dce8a2e2-dc7f-4ba6-8cf4-f432b9c7630a/kixugevitotowo.pdfIn PDF document text
- http://xejefexevopu.epizy.com/dironenu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d2688cda-c71a-4d76-9ad3-3c5703d9ab98/basiwugejosomikewarajaj.pdfIn PDF document text
- http://nuxumejaxumem.epizy.com/46625862031.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a8206370-7f27-49b2-b93b-9154d2082636/dyson_big_ball_animal_2_upright_review.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cd994415-396f-41fb-8c4b-04d113e5b79a/mawoxexel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5b42201b-38cc-45d5-9da3-c8777b24c0c2/lukapev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e26d28c1-1852-43dd-a20a-9441d87145eb/fenam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bd789afa-e919-407e-9222-49e2bcf01941/why_is_my_fridge_not_dispensing_ice.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0e526c8c-6d1d-472d-b840-b36e372497fc/math_addition_worksheets_for_first_graders.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012d57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D57	5124 bytes
SHA-256: `eaa4fb108d11deca2d8c449e06e3f7380887bb70246af138bcd1df8bbcfd06e7`
`font_01_sfnt_off00013eab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EAB	12084 bytes
SHA-256: `d25edf9f3436b6557b1c3bdbb451454c3af480bb1090b6b702dc0f4ecf3e6b78`
`font_02_sfnt_off000165f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x165F0	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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