PDF malware analysis — malicious · 09d26baadcf6f7ca

MALICIOUS

PDF

37.3 KB Created: 2020-05-18 13:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a819f6e8b748bb12bc2fb44118e577be SHA-1: ef756dde13b957bbcf2f7a60b82bec65dcc3813a SHA-256: 09d26baadcf6f7ca2a0b078e4a7601a333e7c4822f881084ad0d1bfb20f7c502

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The embedded document body text, while appearing to be about language exercises, is likely a lure to disguise the malicious intent of directing users to numerous external PDF files hosted on various domains. No scripts were extracted, but the sheer volume of external links points to a malicious campaign, likely involving the distribution of further malicious content or phishing pages.

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://purelinewellness.com/uploads/1/3/0/5/130550736/130550736.html#exercicis+de+diftongs+hiats+i+triftongs
- http://strategicfinancialvision.com/uploads/1/3/0/5/130589097/6099401.pdf
- http://kleenapt.com/uploads/1/3/0/2/130289421/rukuxonikuregi-kijefa-bidenexov-bidojabixawiki.pdf
- http://ghostsquadserver.com/uploads/1/3/1/1/131163712/7bccef0ca9dd7.pdf
- http://industryr.com/uploads/1/3/0/8/130814462/6eea13b36a4bf49.pdf
- http://wpleague.org/uploads/1/3/1/1/131164319/2ed56722edffc.pdf
- http://gcchurchva.com/uploads/1/3/0/9/130969744/xowifagovoju.pdf
- http://declareservices.com/uploads/1/3/1/3/131384281/6657392.pdf
- http://drhandysays.com/uploads/1/3/0/5/130589288/pixugen.pdf
- http://donaflora.com/uploads/1/3/1/3/131379015/xekuladi_ledewonav.pdf
- http://jessicawcheung.com/uploads/1/3/1/4/131483336/385705.pdf
- http://pawinefestival.com/uploads/1/3/0/7/130775505/7057268.pdf
- http://mayetpinspections.com/uploads/1/3/1/6/131636764/021c3e92e7b84.pdf
- http://compostpick-up.com/uploads/1/3/1/1/131163623/5af4c.pdf
- http://ajachinger.net/uploads/1/3/0/2/130291766/5847548.pdf
- http://acasesoriascolombia.com/uploads/1/3/1/3/131382430/6283405.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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_off000061bc.bin` `c550ca86eb7973f16f7d0d56c58aaadefe87a145bd9eaf00f99cfaa87581a4cc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61BC	12064 bytes

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