PDF malware analysis — malicious · 801f8a1a11cba152

MALICIOUS

PDF

43.9 KB Created: 2020-06-05 22:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a818ce3d1a52af426f7490817030ac74 SHA-1: 62e92f8a973c6632a68724f52448b9165907f421 SHA-256: 801f8a1a11cba1527c43ce572cc16622f92b4fbccc027353991fefaf047830d2

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of numerous external links suggests a potential distribution or SEO poisoning campaign.

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://hdremaps.com/uploads/1/3/0/3/130379138/130379138.html#forced+march+pathfinder
- http://midlandcapitol.com/uploads/1/3/1/4/131407709/fc009d.pdf
- http://kctshirtscc.com/uploads/1/3/0/7/130776811/xowigovagikuliw.pdf
- http://qui.social/uploads/1/3/0/6/130621809/85217b.pdf
- http://pan-ac.org/uploads/1/3/1/4/131438579/rufagusojarusi.pdf
- http://ga7hn.bpmtc.com/uploads/1/3/0/5/130540824/3842944.pdf
- http://tvwrestling.co.uk/uploads/1/3/1/3/131383726/0553c294.pdf
- http://padigitalmedia.com/uploads/1/3/1/4/131406092/tejobiwerufa.pdf
- http://carpetcleancary.com/uploads/1/3/0/7/130738792/9417969bc0.pdf
- http://hostmaster.damm-zahntechnik.de/uploads/1/3/0/8/130874535/e15221987c81.pdf
- http://hdremaps.com/uploads/1/3/0/3/130379138/terms.html
- http://hdremaps.com/uploads/1/3/0/3/130379138/dmca.html
- http://hdremaps.com/uploads/1/3/0/3/130379138/policy.html
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://kigepivo.files.wordpress.com/2020/06/95086502991.pdf
- https://sujapavalawu.files.wordpress.com/2020/06/pogarufisolirekixaku.pdf
- https://fojajuxebi.files.wordpress.com/2020/06/76069411502.pdf
- https://sozibibuji.files.wordpress.com/2020/06/navawevalipapiti.pdf
- https://korovite.files.wordpress.com/2020/06/91190709314.pdf
- https://xumeporomax.files.wordpress.com/2020/06/60918067272.pdf
- https://baxejubox.files.wordpress.com/2020/06/25303304666.pdf
- https://xowaduwowere.files.wordpress.com/2020/06/10841145876.pdf
- https://konivopuwu.files.wordpress.com/2020/06/75683541595.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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000080d3.bin` `560095353c6a3cdea13546bcff2c6fe4b713399d7b4601e9214e85258c50679b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80D3	10132 bytes

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