PDF malware analysis — malicious · b3f8f8a03bb52e80

MALICIOUS

PDF

76.0 KB Created: 2021-02-27 04:05:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1cdb066928245f46b0457de3693c806d SHA-1: 3ad556d024c260799e6cb1c5847ccbeca93552f2 SHA-256: b3f8f8a03bb52e806fd47dafb2d34709264ac930e6795d3af15ec4844ca62703

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://fokemale.ru/award?keyword=concepto+de+qu%25C3%25ADmica+org%25C3%25A1nica+inorg%25C3%25A1nica
- https://guwamiludakubor.weebly.com/uploads/1/3/1/4/131453222/e11dfb979af13f4.pdf
- https://bojepelesu.weebly.com/uploads/1/3/5/3/135350442/6161449.pdf
- https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/8f24c370cc5ae.pdf
- http://form-lnstagramcopyrightservices.com/ratogeresuduwilyjufv.pdf
- http://all-system7.xyz/1734-ie4c_channel_faultesxmt.pdf
- https://rupasofo.weebly.com/uploads/1/3/4/8/134892789/1558793.pdf
- https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/tisuk-ratunazusara-xaman.pdf
- http://kakafeg.scienceontheweb.net/fupofanoxoxedunukiz.pdf
- https://fazebepipetuko.weebly.com/uploads/1/3/1/3/131384618/nanenu.pdf
- http://siwosupegejolop.medianewsonline.com/75193724939.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/vonutavekip/41859526012.pdf
- https://s3.amazonaws.com/nijudow/pokemon_emerald_feebas_evolve_guide.pdf
- https://s3.amazonaws.com/jeponowon/65238408743.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_off0000e96c.bin` `44a9eda24f1351537aee34ffae34a4b97f74d87fc5404d54d689ad8d84cbadf6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE96C	5500 bytes
`font_01_sfnt_off0000fb69.bin` `9165d06820393c47f4b330f1243ecec6ad1ffc9eb495b21490c7d775262473bb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB69	11632 bytes

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