PDF malware analysis — malicious · fb2224574d944bb3

MALICIOUS

PDF

39.3 KB Created: 2020-04-11 10:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: cd745b2812c45f957fa76f4aed5a814d SHA-1: aa1f836f20c61a3f96916e4b5d3e3cc4b9f7a563 SHA-256: fb2224574d944bb341092327bd2fbd7dfe5c5cf31f660c2c3c54ed4eefbdfb1d

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.001 PowerShell

The PDF contains a large number of external links to various domains, many of which appear to be part of a link farm designed to artificially inflate search engine rankings. The primary URL, http://74-123-79-231.mgwnet.com/uploads/1/3/0/6/130640128/130640128.html#google+home+compatibility+list, suggests a lure related to Google Home compatibility. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent, likely for phishing or malware distribution.

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://74-123-79-231.mgwnet.com/uploads/1/3/0/6/130640128/130640128.html#google+home+compatibility+list
- http://igi-fitness.com/uploads/1/3/0/5/130588811/wulix-jizozur-lamedamiwiw.pdf
- http://tierisch-tragbar.de/uploads/1/3/0/2/130272582/8639094.pdf
- http://girlbossleadsgroup.com/uploads/1/3/0/2/130288006/bukibonidufabegubi.pdf
- http://ballardholdingsllc.com/uploads/1/3/1/4/131407494/ab5ff85b65.pdf
- http://countrycomfortsmarket.com/uploads/1/3/1/3/131398224/mikazisux.pdf
- http://yoga-shiatsu-hamburg.com/uploads/1/3/0/5/130590298/8628047.pdf
- http://laent.org/uploads/1/3/0/7/130775268/lakigojoboz-somig-tadubexukugig.pdf
- http://kennedystudios.com/uploads/1/3/1/3/131383954/2dee64.pdf
- http://gynecologyreno.com/uploads/1/3/0/2/130289229/1007019.pdf
- http://boisescarpetcleaners.com/uploads/1/3/0/5/130588906/929057.pdf
- http://ahatrade.com/uploads/1/3/1/1/131163908/3810085.pdf
- http://claritycounselingassociates.com/uploads/1/3/0/6/130604527/3209821.pdf
- http://vistum.fi/uploads/1/3/1/4/131407233/kusofunabu.pdf
- http://lhsgaelic.com/uploads/1/3/1/4/131483194/4813745.pdf
- http://gynecologyreno.com/uploads/1/3/0/2/130289229/1007019
- 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_off000068c2.bin` `d62c0c199ac1b3650bfc9dadbf6788a903f8d6613d8ad7283481cbbef2f71411`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68C2	7952 bytes
`font_01_sfnt_off0000876a.bin` `41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x876A	2600 bytes

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