PDF malware analysis — malicious · 4422d3504233e0b3

MALICIOUS

PDF

53.0 KB Created: 2020-04-26 23:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: c68cbb4bacc66f68292b9937d7ce0508 SHA-1: c87529e8f2b4e9095f9061166d29f3552bf9efca SHA-256: 4422d3504233e0b3e97e4f64bd67bebe44530dc78a480167ce2566ad7e755592

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, a common tactic for SEO poisoning or redirecting users to malicious sites. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a visa application. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or redirection strategy. 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://hinterlandtreeservicesbyronbay.com/uploads/1/3/1/3/131379559/131379559.html#non+immigrant+us+visa+application+form+barbados
- http://rubycellar.com/uploads/1/3/0/4/130489361/golajo.pdf
- http://aaronjnow.com/uploads/1/3/0/4/130477448/lafokixupikepe.pdf
- http://alphonso.studio/uploads/1/3/1/4/131438667/wawikojumop.pdf
- http://lastcastlebrewing.com/uploads/1/3/0/7/130776308/f0bb6ea.pdf
- http://thereforemade.com/uploads/1/3/0/7/130775297/7c9289181ee34d.pdf
- http://hairextensionslive.com/uploads/1/3/0/6/130605149/bimujakakipaw_walum_firaputerixir.pdf
- http://greatersawgrassdems.org/uploads/1/3/0/5/130551621/a72939d4.pdf
- http://pcrx.ca/uploads/1/3/1/3/131382497/widutagapafulomoda.pdf
- http://pentictondumpsterrental.com/uploads/1/3/0/8/130814040/wilajexopafuvokab.pdf
- http://appalachianbreastfeedingservices.com/uploads/1/3/0/3/130313356/8435844.pdf
- http://caitclements.org/uploads/1/3/1/0/131070043/0c093586ab2.pdf
- http://technolgytransfer.com/uploads/1/3/0/2/130272488/6c92f4bfe5fc.pdf
- http://www.b-dogdesign.nl/uploads/1/3/0/5/130539458/xivoguboxas-fetefelivetun.pdf
- http://attorneyfloridaprobate.net/uploads/1/3/0/9/130968962/zirojowufe.pdf
- http://surreymobilepetgrooming.com/uploads/1/3/0/5/130539427/c81be894852f.pdf
- http://rubycellar
- 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_off0000997a.bin` `bc5d9d4a97a434fab6eb4afcd8d395d1ab876ba4e056631c1f619f584cab199f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x997A	9120 bytes
`font_01_sfnt_off0000bbee.bin` `d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBEE	2616 bytes

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