PDF malware analysis — malicious · 6597ff9b64ccc6e4

MALICIOUS

PDF

49.0 KB Created: 2020-04-10 02:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 958501491028d2395e601e7d16177700 SHA-1: 1ab3702432b18a4d03b406ed5dc4565d6b6780f0 SHA-256: 6597ff9b64ccc6e4d99510033a2aa060d1e703a81963f7d7e77b5c3790e7c3d0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to various websites, many of which appear to be part of a link farm. The ML classifier strongly indicates maliciousness. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on these linked domains.

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://xrossingborders.net/uploads/1/3/0/5/130550888/130550888.html#apache+spark+with+java+book+pdf
- http://nailandbeautybar.net/uploads/1/3/1/0/131070377/800597.pdf
- http://roberthynes.com/uploads/1/3/0/7/130775727/tokedigil.pdf
- http://jazzcopy.com/uploads/1/3/0/6/130620691/8ca1184.pdf
- http://tjmarkets.ca/uploads/1/3/1/1/131164472/c31e90b070.pdf
- http://bghsboosters.org/uploads/1/3/0/3/130313454/rutuxagilixipu_futereb.pdf
- http://barryderbyshire.com/uploads/1/3/1/4/131454807/divixatewitegusinizu.pdf
- http://renzobarrett.com/uploads/1/3/0/6/130604904/9bd7d.pdf
- http://boobysbeachshop.com/uploads/1/3/0/8/130874180/mofepobizew.pdf
- http://chibrossblog.com/uploads/1/3/0/5/130590314/e65caad4e.pdf
- http://gracellabellahampers.com/uploads/1/3/0/5/130590443/8a6f8cc.pdf
- http://api1169.org/uploads/1/3/0/3/130323277/75d762d.pdf
- http://bonasso.ch/uploads/1/3/0/8/130813876/kubuwodojatasine.pdf
- http://bruar-kelpies.com/uploads/1/3/0/6/130604147/wamuk.pdf
- http://dronestuff.com/uploads/1/3/1/4/131482850/suwik.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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007a52.bin` `f59435a2efb9a33aa20c74e387ddf9afd1d6d0f2916d57dcf8ab12a2b81085bf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A52	7700 bytes
`font_01_sfnt_off00009869.bin` `1ec5e4369fa4295c2cd6b0b3a1791cabbbdecd5398ecc7ca77fac8fc27e625d5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9869	2612 bytes
`font_02_sfnt_off0000a198.bin` `779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA198	16036 bytes

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