PDF malware analysis — malicious · bb3001cc53a9be03

MALICIOUS

PDF

38.4 KB Created: 2020-05-21 08:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dcfa943d393558164270ae61ca6a01f0 SHA-1: cd63eb6bab9b262a9611ed5016591e2f44ab1e9f SHA-256: bb3001cc53a9be0353b13d46eeba6f90920ca6128ebbebb53eff7d654c017465

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but also includes URLs, suggesting the primary purpose is to redirect users to potentially malicious external sites. The presence of numerous numeric-based slugs in the URLs points towards a link farm or SEO manipulation tactic, which is often used to host or distribute malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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://secure-pof.com/uploads/1/3/0/3/130313213/130313213.html#hot+t+bone+steak+usmle
- http://traverto.com/uploads/1/3/0/2/130289636/vixugade.pdf
- http://derekhardman.com/uploads/1/3/0/2/130289172/tojeteluxuweregemos.pdf
- http://beardedsurfer.com/uploads/1/3/1/3/131383404/e218c60.pdf
- http://podosekconstruction.com/uploads/1/3/0/5/130590105/perabikuvupiw.pdf
- http://aleveleducation.com/uploads/1/3/1/6/131606490/wabig-rodejatujepil-nizuzedodubuza.pdf
- http://juliepatey.com/uploads/1/3/0/5/130543087/bolaxupirobobifo.pdf
- http://coldwellbankerlivingthedream.com/uploads/1/3/0/2/130291350/pufubijiw.pdf
- http://jnmfitnesssolutions.com/uploads/1/3/0/5/130588489/1652009.pdf
- http://sarahboulterart.com/uploads/1/3/0/7/130739192/2a4e49e6d0.pdf
- http://jdkd9f012asdf8ub.com/uploads/1/3/0/7/130740209/3043902.pdf
- http://de-engelenweij.nl/uploads/1/3/0/2/130288453/7007978.pdf
- http://resumesontherun.com/uploads/1/3/0/5/130539922/021f391738b0d.pdf
- http://zarktwain.com/uploads/1/3/0/6/130604812/8410115.pdf
- http://sacredcirclecounseling.com/uploads/1/3/0/7/130776445/11b6114.pdf
- http://tholomy.com/uploads/1/3/1/1/131163635/3691963.pdf
- http://shaversavers.com/uploads/1/3/0/3/130379060/7884444.pdf
- http://cosmetology.studio/uploads/1/3/0/5/130551021/nonokabepelu.pdf
- http://perfumesconferomonas.com/uploads/1/3/0/6/130639879/bafesu.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_off0000690c.bin` `521c979af6315212ad7460ab999e6817b37651d45569fc8984b429f5ebfd60fb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x690C	11152 bytes

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