PDF malware analysis — malicious · 17054a31a975b9a1

MALICIOUS

PDF

39.7 KB Created: 2020-06-04 01:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e77004a0fc860d91d8a5130d6678ef17 SHA-1: 2ebfafdd8d749fd7802e22e3041135c556f020d8 SHA-256: 17054a31a975b9a19ec44437f3581fdd42d340e01df864635bfbff3560594b7b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs likely lead to further malicious content or phishing pages, and the document body itself contains obfuscated text and URLs.

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://emptynesteragent.com/uploads/1/3/1/4/131454770/131454770.html#tipos+de+bacterias+nitrificantes+pdf
- http://wlptax.com/uploads/1/3/1/8/131858353/cceca.pdf
- http://hmcorsetcompany.com/uploads/1/3/1/4/131453325/3026248.pdf
- http://broodie.us/uploads/1/3/0/8/130874059/jovexaw.pdf
- http://1695river.com/uploads/1/3/1/4/131407439/zegofofaxujubegatimi.pdf
- http://interbankpayment.org/uploads/1/3/0/5/130589415/3239048.pdf
- http://old-creek-ranch.com/uploads/1/3/0/5/130550721/5297198.pdf
- http://frankfortinc.com/uploads/1/3/0/5/130543402/kulemega-revigoleva-tekidofowupidop.pdf
- http://emptynesteragent.com/uploads/1/3/1/4/131454770/terms.html
- http://emptynesteragent.com/uploads/1/3/1/4/131454770/dmca.html
- http://emptynesteragent.com/uploads/1/3/1/4/131454770/policy.html
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://kovuruboxa660899873.files.wordpress.com/2020/06/65419792717.pdf
- https://jenapevar.files.wordpress.com/2020/06/jokosiregufefotusisu.pdf
- https://gakovodoja.files.wordpress.com/2020/06/zerizoworikapibuxokegin.pdf
- https://seteletunifa.files.wordpress.com/2020/06/36625036354.pdf
- https://butisukumig.files.wordpress.com/2020/06/54910409777.pdf
- https://vorelav760549551.files.wordpress.com/2020/06/tozovidupi.pdf
- https://lerigix.files.wordpress.com/2020/06/99756392908.pdf
- https://fimisomanan.files.wordpress.com/2020/06/romadowulere.pdf
- https://bolelotubof10880063.files.wordpress.com/2020/06/15382334348.pdf
- https://jidibabeja.files.wordpress.com/2020/06/kolozosulevuzub.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_off00006993.bin` `ae52475a9e78bdefca418084d17457db1e234bb091e4ec8236ab9c7834623feb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6993	12096 bytes

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