PDF malware analysis — malicious · de63af3d2b7caeb3

MALICIOUS

PDF

63.0 KB Created: 2020-03-31 08:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: f6529f1fdd3cd6b55320cc519ca43426 SHA-1: 1323b9bb93e77675ad04f724619325574fa908c8 SHA-256: de63af3d2b7caeb3ac01c716398c8782b7890dbfd214990abb90ff7fcf045a3c

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier strongly indicates maliciousness. The primary purpose appears to be acting as a link farm, likely to distribute further malicious content or for SEO manipulation. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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://kellykampftherapy.com/uploads/1/3/0/5/130590296/130590296.html#pietta+1851+navy+powder+load
- http://sanflea.com/uploads/1/3/0/7/130739200/6927623.pdf
- http://mimiandjoel.us/uploads/1/3/0/3/130379222/393802.pdf
- http://scholarshipsupportservices.org/uploads/1/3/0/6/130604419/9923ded3e88fde.pdf
- http://richrayburnroofing.com.richrayburnroofing.com/uploads/1/3/0/2/130272291/4de8b79d4bedbb9.pdf
- http://simplydirecthealth.org/uploads/1/3/0/4/130493037/5c0b74e12.pdf
- http://faddyenergy.com/uploads/1/3/0/7/130740556/jaxezomo.pdf
- http://hostmaster.premierweb.org/uploads/1/3/0/4/130476778/baxogazujosirogopuj.pdf
- http://forsalebyownerdiscount.com/uploads/1/3/0/3/130313445/8ae76b448a9c2.pdf
- http://topnailwraps.com/uploads/1/3/0/7/130739301/6545562.pdf
- http://fietsfunepe.nl/uploads/1/3/0/2/130273752/fopasakaxalomeba.pdf
- http://miasapproach.com/uploads/1/3/0/8/130874669/gokutige.pdf
- http://designsbymak.com/uploads/1/3/0/6/130639157/muwaxomusefululipag.pdf
- http://netzeroflorida.com/uploads/1/3/0/6/130620982/bcaed1bd72a.pdf
- http://elsatravel.net/uploads/1/3/0/8/130873860/2165653.pdf
- http://thesalondinner.com/uploads/1/3/1/0/131069923/safoxibupipo_ledudoped.pdf
- http://scottkennel.com/uploads/1/3/0/4/130483276/0d331293068.pdf
- http://trustedfinancialpro.com/uploads/1/3/0/6/130639249/3e8df1ec.pdf
- http://swipeez.com/uploads/1/3/0/2/130291884/bb3645.pdf
- http://evol2save.com/uploads/1/3/0/7/130775594/7ab2a4b6e43fee.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c946.bin` `b176e3a2c728bd65ac0507e1057fc590b7e51c7da3ddfdca58fddd0d85e23ee1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC946	9408 bytes

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