PDF malware analysis — malicious · 1546222d7c7e4486

MALICIOUS

PDF

61.1 KB Created: 2020-04-25 03:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 34b2173950aa1f3162cd18224f01a257 SHA-1: d9bb979006cde49ff9b904cb20922125642265af SHA-256: 1546222d7c7e4486f161bd4f5ad2301b7a41248554018ca2f30588cc6222e851

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to external PDF files across various domains, indicating a link farm or content distribution network. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links suggests an attempt to manipulate search engine results or distribute further payloads. No scripts were extracted, but the structure and URL patterns are indicative of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 4

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.
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 http://securesoundsafety.com/uploads/1/3/0/5/130551746/130551746.html#thesis+format+chapter+1+tagalog
- http://everedge-consulting.com/uploads/1/3/0/7/130738825/gugojukaxuluvix.pdf
- http://jccoach.com/uploads/1/3/0/5/130538923/vegegu.pdf
- http://henbro-bakes.com/uploads/1/3/0/2/130270889/4419140.pdf
- http://leadsmarketing.agency/uploads/1/3/1/4/131438050/tokesibem-zidojirax-gufusewo-raxopi.pdf
- http://pittsfieldchurchofchrist.com/uploads/1/3/0/7/130739159/b38bc8cbd1.pdf
- http://greenthumbgardening.info/uploads/1/3/1/4/131437434/pujusulusejozo-danava.pdf
- http://eclipzglobal.com/uploads/1/3/1/3/131380625/koniro.pdf
- http://firstmeeting.com/uploads/1/3/1/6/131606947/bfc61.pdf
- http://missybs.com/uploads/1/3/0/8/130874670/nemugi-xilekiwurijope.pdf
- http://106redirect.com/uploads/1/3/0/4/130490461/4204162.pdf
- http://futurestake.net/uploads/1/3/0/6/130621947/4827882.pdf
- http://bitesinthepeach.com/uploads/1/3/1/3/131398025/maberisawapu.pdf
- http://aandbevents.com/uploads/1/3/0/4/130435701/f9c5d.pdf
- http://tessakonzal.com/uploads/1/3/0/4/130483389/3c77be.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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/
- https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000be20.bin` `0b595d818cdc28599a82f5fc7192674e53039bf6de5b9afc1c487888d0433a24`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE20	8548 bytes
`font_01_sfnt_off0000debb.bin` `ccdb513f9f9b997ab503fae1484a3e920b4b4fc659fa9bd94a418ce32750de73`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEBB	2600 bytes

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