PDF malware analysis — malicious · e84a2537ca430341

MALICIOUS

PDF

48.1 KB Created: 2020-04-17 02:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: fd246370c8a10b247f722b3572960019 SHA-1: e2268fad1b8aebabaa4e56136710e94724d3534c SHA-256: e84a2537ca43034144e7804a477385da2220e1199b3e14288ebe5c573dea45a0

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDFs hosted on various domains. The document body text, though partially corrupted, includes the phrase 'Editable calendar template microsoft word', suggesting a lure to trick users into downloading or interacting with malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-like links indicates a potential link farm or redirection scheme designed to distribute further malware or lead to phishing sites.

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://donostia-restaurant.com/uploads/1/3/0/5/130539820/130539820.html#editable+calendar+template+microsoft+word
- http://highlightshopping.com/uploads/1/3/0/8/130813786/f9f8411160757c.pdf
- http://profilepasser.com/uploads/1/3/0/4/130483345/vexupozafofeka_xefejo.pdf
- http://bonitamersiades.org/uploads/1/3/0/3/130379060/2619073.pdf
- http://title44coffee.com/uploads/1/3/0/5/130551882/805566.pdf
- http://whyministries.com/uploads/1/3/1/3/131384166/rabapepa.pdf
- http://welcometoyourbodymindandspirit.com/uploads/1/3/0/8/130814280/fovegiwetijaxuj-lavulepapa-pafezaz-fuluxe.pdf
- http://chynadolltresses.com/uploads/1/3/0/5/130540507/4261680.pdf
- http://webdisk.noorderlanden.nl/uploads/1/3/0/6/130604009/vekovuga.pdf
- http://mandwfoundation.com/uploads/1/3/1/3/131398131/997154.pdf
- http://sasquatchsyndicate.org/uploads/1/3/0/5/130539085/zexifoxoz.pdf
- http://sinshape.com/uploads/1/3/1/3/131384575/zamabotidevodutu.pdf
- http://weddingdjoxfordshire.com/uploads/1/3/0/7/130739222/5782bdb3f15f.pdf
- http://chbookpros.com/uploads/1/3/0/3/130313513/rejotakib.pdf
- http://foodstopmalaysiacuisines.com/uploads/1/3/0/6/130639062/cb1c497.pdf
- http://whyministrie
- 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007fa4.bin` `25051acd31433c66740a005c7435d617dc4b7e24ca215e775a9ce63db324971f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FA4	7456 bytes
`font_01_sfnt_off00009ce7.bin` `2dd05fea0cb85059f8eadf883dfa77533617bf048b71d14041bfe0b9caf9ea4b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CE7	16560 bytes

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