PDF malware analysis — malicious · 07ae843c90c91f8d

MALICIOUS

PDF

39.3 KB Created: 2020-06-10 02:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dd951f0baeb2c55ffd39ec1cb876895b SHA-1: fe923f08a4ef5c35f69595db087cc118f3b4e810 SHA-256: 07ae843c90c91f8d2520c2da25dd106a468592061c47900eabe58c950fb75dd6

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains a large number of embedded external links, as detected by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness.

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://norakeys.com/uploads/1/3/1/3/131383255/131383255.html#como+fazer+um+relatorio+p%25C3%25B3s+evento
- http://4nk.undesirable.us/uploads/1/3/0/7/130776245/xutufimosu.pdf
- http://maggietham.com/uploads/1/3/1/0/131070247/82d00eee.pdf
- http://mta-sts.mail.uralta.si/uploads/1/3/0/5/130540116/5566836.pdf
- http://cutjargon.com/uploads/1/3/1/4/131453832/pusofaxesaxatetisoj.pdf
- http://autodiscover.artsontheislands.org/uploads/1/3/2/3/132303041/wubeje.pdf
- http://adorableuplustoo.com/uploads/1/3/0/4/130478374/5175237.pdf
- http://capri.fun/uploads/1/3/1/4/131453084/ravazevo.pdf
- http://atallconstruction.com/uploads/1/3/1/4/131438109/1d8d7da649e0.pdf
- http://doubleheartsoapcompany.com/uploads/1/3/0/3/130312952/2612be8f6ac7.pdf
- http://jobsight365.com/uploads/1/3/0/5/130588452/mitader-setuzi-sukapamoduji-pewuduwegedaked.pdf
- http://manageyourlifebook.com/uploads/1/3/1/8/131856903/22d6918.pdf
- http://forestandsmith.com/uploads/1/3/1/0/131071231/zobuvotavomew-jalovuwinasa-vimetosejo-kawokozinazi.pdf
- http://sweetreliefcollc.com/uploads/1/3/2/3/132303219/ac02cb2c2ac050.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://polagigeso.files.wordpress.com/2020/06/96369726819.pdf
- https://pabozig.files.wordpress.com/2020/06/zowanepiwirofewoba.pdf
- https://patepekugi.files.wordpress.com/2020/06/51630267521.pdf
- https://netigosod285927460.files.wordpress.com/2020/06/90121641657.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_off00006a35.bin` `9eabbbafd4795320ed5b08e0d893fe3d938d673096d3e562f438a960772049df`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A35	11880 bytes

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