PDF malware analysis — malicious · a3e3d0d340b7e5ec

MALICIOUS

PDF

49.8 KB Created: 2020-03-13 08:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: f47d2968334b6011678612065727e1fc SHA-1: 6cec78a2dccc8ec8a3b5b1369df5dbd098d9ff5c SHA-256: a3e3d0d340b7e5ec4cf601e4a978341b8066b99882f8a364a6441826878dfd4e

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are likely used to host further malicious content or to manipulate search engine results.

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://kcbevco.com/uploads/1/3/0/6/130605426/130605426.html#arbitration+clause+sample+illinois
- http://buddybeds.net/uploads/1/3/0/8/130874126/jinir-puziferabuvaj.pdf
- http://thissideofhope.com/uploads/1/3/0/4/130476215/xadopevepejisu-bikam.pdf
- http://ichoosefoundationinc.org/uploads/1/3/0/7/130740371/547036.pdf
- http://mx.roxyproject.com/uploads/1/3/0/6/130621290/9440972.pdf
- http://ccsb.danafarberdev.org/uploads/1/3/0/7/130775347/nowemim_kibewobora_nefiw.pdf
- http://www.gavin-tollman.com.au/uploads/1/3/0/4/130488736/f750997b.pdf
- http://pocusworld.com/uploads/1/3/0/7/130740112/ribon-mojowi-wewolulorudu-sajexefipoxare.pdf
- http://sweetrevolt.com/uploads/1/3/0/3/130313555/93dcf7f67e1c76.pdf
- http://wordwrecker.com/uploads/1/3/0/5/130550903/nanepumapujaxuk_ludajimep.pdf
- http://dinner-ateight.com/uploads/1/3/0/5/130550715/7247898.pdf
- http://luchalscateringllc.com/uploads/1/3/0/7/130775306/5006111.pdf
- http://liztongmft.com/uploads/1/3/0/7/130775025/vexun.pdf
- http://syossetcommunitychurch.org/uploads/1/3/0/5/130590741/nipipelewewif.pdf
- http://missionexcell.com/uploads/1/3/0/8/130814161/d020368517ad.pdf
- http://mail.peanutandpiglet.co.uk/uploads/1/3/0/6/130605306/6020818.pdf
- http://aacslpvancouver.com/uploads/1/3/0/2/130289776/sakupivijibita-fetof-poxarita-jajam.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008e81.bin` `721152ce7f7cb7438976e4e66db7bf061173aa22a859e25ab7d6d2d4b5367394`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E81	1740 bytes
`font_01_sfnt_off000096ba.bin` `9fe1b119fd6c430cb676e96d31e3d7adae904efa3336b61d0088b156537e2133`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96BA	9096 bytes

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