PDF malware analysis — malicious · 93fc5c03f6c572e9

MALICIOUS

PDF

55.7 KB Created: 2020-03-24 23:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: c8116ea09f19b20793fe46caca34ccfb SHA-1: d0dbb4299bd0dd2f2a277e21e3b8d6a2c2e9909d SHA-256: 93fc5c03f6c572e9b02440d2d2af1441edea5f1bf8856e35a0eb1f512e026ceb

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier strongly indicated maliciousness. The primary purpose appears to be directing users to a vast network of external URLs, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

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://witherlysgreenhouse.com/uploads/1/3/0/7/130776567/130776567.html#journey+2+mysterious+island+actors
- http://kchungphotography.com/uploads/1/3/0/5/130539350/bojofajowenige.pdf
- http://raghavmehta.com/uploads/1/3/0/4/130477018/nuxujoruniparo_wigezatisiwita_dilinaxo_womitofefo.pdf
- http://estudiorins.net/uploads/1/3/0/8/130814341/tujojatozitatax.pdf
- http://judysmitzvah.com/uploads/1/3/0/8/130814874/pogugixovakutugame.pdf
- http://lrslogistics.com/uploads/1/3/0/9/130969623/rirat-fufiboreziber.pdf
- http://www.massagebyfidel.com/uploads/1/3/0/2/130272426/ponabubifi-movero.pdf
- http://johndominguez.art/uploads/1/3/0/6/130639326/jokune-gopedop-tumupekidediv.pdf
- http://mvstuff.com/uploads/1/3/0/8/130813077/gejoladazinikolev.pdf
- http://sunburstmusic.org/uploads/1/3/0/9/130969587/zurebozivibun.pdf
- http://imrsv-x.net/uploads/1/3/0/4/130435588/7829851.pdf
- http://umfsr.org/uploads/1/3/0/5/130540186/ganow_pafeto_sodet.pdf
- http://pwhomeimprovement.net/uploads/1/3/0/7/130739385/fetozalurikuxonawev.pdf
- http://bearvbaby.com/uploads/1/3/0/2/130289679/6297722.pdf
- http://imagift.org/uploads/1/3/0/7/130738727/1950d6ea44.pdf
- http://hempisbest.com/uploads/1/3/0/4/130476678/xanetuxir-mokutukapit.pdf
- http://thesustainables.biz/uploads/1/3/0/7/130776413/4d1ec0358d31be.pdf
- http://genslcr.com/uploads/1/3/0/2/130287735/nezejarudofokutepeje.pdf
- http://mail.living-practically.com/uploads/1/3/0/4/130476574/7861324.pdf
- http://misshufnagel.com/uploads/1/3/0/7/130739490/3927475.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_off0000ad02.bin` `e39a5fbaba76c4ca710e91edec730f0f203c2d6580506f49ec9f408fea50d846`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAD02	9084 bytes

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