PDF malware analysis — malicious · 7c53e03df66d75dd

MALICIOUS

PDF

39.0 KB Created: 2020-03-29 11:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: edaa46a61d648b453b389c5931185cde SHA-1: 6b344a9241aeeea5302e55760f12db83eb6b433e SHA-256: 7c53e03df66d75ddac9b011a8aeb775d6bde1e04373dfdf8ba3da0e6d58d09fb

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML_NYX_PDF_MALICIOUS heuristic also flagged this file with high confidence. The document body text and embedded URLs suggest a link farm or SEO manipulation tactic, potentially used to distribute further malicious content or to artificially inflate search engine rankings.

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://netnoodle.net/uploads/1/3/1/3/131384777/131384777.html#ejemplo+de+persona+moral+regida+por+el+derecho+publico
- http://flowerssensationsbyeyleen.com/uploads/1/3/0/2/130272260/maxedu.pdf
- http://poshlifezone.com/uploads/1/3/0/4/130435641/5056818.pdf
- http://catholiccharitiesctx.org/uploads/1/3/0/5/130543087/698409.pdf
- http://thegamingfund.com/uploads/1/3/0/6/130620410/gamovi.pdf
- http://jarofthreads.com/uploads/1/3/1/3/131379578/giwos.pdf
- http://katiegracephotos.com/uploads/1/3/0/4/130476272/8311620.pdf
- http://tinyplanettours.com/uploads/1/3/0/6/130604500/wanoninuj.pdf
- http://iammeckle.com/uploads/1/3/0/7/130775205/rasod.pdf
- http://booneheritagefestival.com/uploads/1/3/0/5/130539702/459458.pdf
- http://managermom.ca/uploads/1/3/0/5/130541465/tomufigoxi-kutazavi.pdf
- http://harveyrei.com/uploads/1/3/0/2/130287317/7264343.pdf
- http://acaciabuildersandcarpentry.com/uploads/1/3/0/3/130379415/5179296.pdf
- http://autopaintsupplyinc.com/uploads/1/3/0/5/130541688/vevid.pdf
- http://exactransreportingsvcsinc.com/uploads/1/3/0/3/130379757/049aaba8db38.pdf
- http://ilahimesk.com/uploads/1/3/0/4/130476502/e5fce7fa455f.pdf
- http://asrtoolbox.com/uploads/1/3/0/2/130272981/a5bf8bac7.pdf
- http://armonkfire.com/uploads/1/3/0/6/130604083/4973311.pdf
- http://natashasfantastic5dollarbling.com/uploads/1/3/0/4/130483558/5343762.pdf
- http://estudio-lovestoned.com/uploads/1/3/0/8/130874591/5409ec.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_off00007093.bin` `df172617b8b26042bc5a485fea7f64ec53a09f798dbd91fcd7f500ec6df4a837`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7093	7424 bytes

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