PDF malware analysis — malicious · f6a81a5d6cd72cab

MALICIOUS

PDF

49.5 KB Created: 2020-03-29 02:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: a7e8609eccb9a782b557af1edb80c24f SHA-1: 75475b877f8542cc52a64c3b3487af69837205b1 SHA-256: f6a81a5d6cd72caba0e25f46b18ca07ef3a35dc9d14573a8da817bb0f70b507d

92 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links to various domains, a technique commonly used for SEO link farming. The ML classifier strongly indicated maliciousness. The primary URL points to an HTML page with a title related to surgical nursing, likely a lure to disguise the malicious intent of redirecting users to a network of PDF files.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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
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://tcsonline.net/uploads/1/3/1/4/131407625/131407625.html#cuales+son+los+principios+de+la+enfermeria+quirurgica
- http://www.desertcreekbirddogtraining.com/uploads/1/3/0/5/130550966/kudulofoxepe.pdf
- http://theheartsforhadley.com/uploads/1/3/0/7/130738524/6045423.pdf
- http://www.hardhatinvestments.com/uploads/1/3/0/6/130621304/73b352afc.pdf
- http://cooperspowerwashllc.com/uploads/1/3/0/6/130639461/2928568.pdf
- http://aanu.org/uploads/1/3/0/8/130814225/wunutisi.pdf
- http://beautyenpointe.com/uploads/1/3/0/5/130540937/sututodiw.pdf
- http://www.houseforsalegozo.com/uploads/1/3/0/8/130813111/vikebo.pdf
- http://www.mimiharding.com/uploads/1/3/0/7/130775474/nutesexev.pdf
- http://motherhongkong.com/uploads/1/3/0/6/130621135/noseweni.pdf
- http://mta-sts.suzohickey.com/uploads/1/3/0/9/130969878/9962023d92.pdf
- http://hempathy.info/uploads/1/3/0/6/130604098/16ff3247c.pdf
- http://www.logicalpsychological.com/uploads/1/3/0/6/130620986/jubarakoxenis.pdf
- http://innatribe.com/uploads/1/3/0/7/130740340/futumobogojulibukun.pdf
- http://makarrgarma.org/uploads/1/3/0/5/130539366/kuviw_mivojagekata.pdf
- http://seydarebai.com/uploads/1/3/0/6/130620233/vamudugejatax-geful.pdf
- http://www.jewelgobeanutrition.com/uploads/1/3/0/5/130542953/921b0fa1ce1a.pdf
- http://partyrentalscamdennj.com/uploads/1/3/0/4/130483295/7071156.pdf
- http://www.prestigepayeeservices.org/uploads/1/3/0/7/130776747/f1a642e18.pdf
- http://dbroofingandbuildingmaintenance.com/uploads/1/3/0/5/130550901/luxuvat-wufusofu-mobedo.pdf
- http://www.35knotsbrasil.com/uploads/1/3/0/5/130546118/1503427.pdf
- http://cassiettajefferson.org/uploads/1/3/0/7/130775476/raziw.pdf
- http://soivan.com/uploads/1/3/0/6/130640181/5075075.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_off00008c96.bin` `e82168ca479ddbece86c30e579efa5705ebb76146c6fc5ab765affa416bd0faa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C96	8860 bytes
`font_01_sfnt_off0000acb6.bin` `41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xACB6	2600 bytes

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