PDF malware analysis — malicious · 593f7ed07bc3b022

MALICIOUS

PDF

55.9 KB Created: 2020-04-11 11:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 2bc2a636d13487798b6a4c2d5921d5ce SHA-1: b80867b3d7c5ecfac74c64bef8c57e480be52d8f SHA-256: 593f7ed07bc3b02248cc93d116f5da748bc25a2cc112224c872ff2dce294d857

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. The ML classifier also flagged this PDF with high confidence. The document body text is heavily corrupted, but the presence of numerous external links suggests a link farm or distribution mechanism for 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://sanfranciscopeacetreaty.org/uploads/1/3/0/8/130874122/130874122.html#d%C3%B6rt+anla%C5%9Fma+toltek+bilgelik+kitab%C4%B1
- http://racheldroessler.com/uploads/1/3/0/2/130273987/xagok.pdf
- http://katfergusonphotography.com/uploads/1/3/0/6/130639347/gisuziregotezip.pdf
- http://your-bill-negotiator.com/uploads/1/3/0/5/130542710/6384669.pdf
- http://foryoubymecreations.com/uploads/1/3/0/6/130621435/c991a840201f6.pdf
- http://orbitsingle.com/uploads/1/3/0/7/130739889/4312517.pdf
- http://rtimsartteacher.com/uploads/1/3/0/7/130739626/wuzix_fepumoromizi.pdf
- http://its-true.org/uploads/1/3/0/6/130604723/jurubafibek-zikubatilarip.pdf
- http://rejdesigns.com/uploads/1/3/1/4/131453520/5049847.pdf
- http://fernandoslandscape.net/uploads/1/3/0/8/130874332/b65c23a6760.pdf
- http://ministrycoachassociates.net/uploads/1/3/0/7/130775277/7800897.pdf
- http://byblair.co/uploads/1/3/0/2/130287837/9305688.pdf
- http://mdhighwaysafetysummit.org/uploads/1/3/0/6/130603941/rumojonu.pdf
- http://skeezyrat.com/uploads/1/3/0/8/130813111/2693524.pdf
- http://businessrecordsfortodayandtomorrow.com/uploads/1/3/0/6/130639648/kejizifageduxid-fuduzimufenawe-numepufudip-nomupujupubolin.pdf
- http://motherhustler.com/uploads/1/3/0/4/130483697/jufonobixavamorofu.pdf
- http://mdhighwaysafetysummit.org/uploads/1/3/0/6/13
- 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_off000098a5.bin` `95cd5e97a544705ef20be550ac69615825fb168a7b831ec0e5af5ce89e586471`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98A5	10172 bytes
`font_01_sfnt_off0000bc1f.bin` `779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC1F	16036 bytes

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