PDF malware analysis — malicious · 06a7f2431fd5b87f

MALICIOUS

PDF

51.6 KB Created: 2020-04-11 11:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 47e78c248d712ef6976ff6589d8c8723 SHA-1: 19c4bc8b0e83244fb9d25b1876138553fac02fda SHA-256: 06a7f2431fd5b87f97cef8b7a009024f3bff4b5184b89135167fdb644ba37a9d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are structured as SEO-optimized URLs pointing to other PDF files. The primary URL, 'http://the-whole-thing.com/uploads/1/3/0/4/130435574/130435574.html#periodic+table+webquest+worksheet+an', suggests a lure related to educational content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent behind the link farm.

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://the-whole-thing.com/uploads/1/3/0/4/130435574/130435574.html#periodic+table+webquest+worksheet+an
- http://2005-chevrolet-silverado-ss.com/uploads/1/3/0/9/130969483/ziwejelitubinop.pdf
- http://americanbearandcub.com/uploads/1/3/0/5/130590312/4380818.pdf
- http://ecproperty.net/uploads/1/3/0/5/130588498/ropezuzotezo_domipizexu_vegibasazed_refiru.pdf
- http://imaginativecoaching.com/uploads/1/3/0/4/130435881/jotetukogafu.pdf
- http://teamcalhoun.us/uploads/1/3/0/2/130288394/gokapisuwu.pdf
- http://honorforlife.com/uploads/1/3/0/3/130313638/7ca01e9e71.pdf
- http://shewhoknowsmagazine.com/uploads/1/3/0/7/130775515/pawidexabi.pdf
- http://soundmedical.org/uploads/1/3/0/6/130639953/jepikuva_fibawatifowisak_tinomugopot_kovuwabudugiju.pdf
- http://m2mdataservice.business/uploads/1/3/0/4/130436224/c8d03dd4223f8.pdf
- http://devonlamar.net/uploads/1/3/1/4/131437504/puwowasuwiba.pdf
- http://acnocvietnam.com/uploads/1/3/1/6/131607013/517334.pdf
- http://lovethathairco.com/uploads/1/3/1/3/131379054/1d201ceb.pdf
- http://walktogethercounselling.com/uploads/1/3/0/4/130476921/nojexof.pdf
- http://inversityhq.org/uploads/1/3/0/8/130813714/vumoxurek.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/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008bbd.bin` `6d4550298ff95476338675fd3120a53bc47b332dd5bab3502e27fd4583879e6f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BBD	8556 bytes
`font_01_sfnt_off0000ac78.bin` `f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC78	16204 bytes

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