PDF malware analysis — malicious · 5ae3f1e095be2441

MALICIOUS

PDF

58.4 KB Created: 2020-03-31 12:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 37bdbebe0a3456d1914ca12e634fd9e4 SHA-1: 7ebfaf7b8dd3681a72cdae796a110ad5f843d598 SHA-256: 5ae3f1e095be244116c8fb2086db2adfa43073347c24238fcd29c40fc92d806f

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, while partially corrupted, contains a title related to social research methods, suggesting a potential lure to disguise the malicious intent of linking to numerous external resources.

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://coachconsulting.net/uploads/1/3/0/8/130874217/130874217.html#metodos+para+la+investigacion+social+raul+rojas+soriano+resumen
- http://nomorediamonds.com/uploads/1/3/0/9/130969706/vokowi.pdf
- http://kilpatrickpropertygroupllc.com/uploads/1/3/0/6/130621479/juzabukapa.pdf
- http://summerslamcricket.com/uploads/1/3/0/8/130873957/5854509.pdf
- http://ideel.org/uploads/1/3/0/6/130620472/rofoxisadurisikovut.pdf
- http://wildlife-cameraman.com/uploads/1/3/0/6/130620987/luxix.pdf
- http://3econsulting.org/uploads/1/3/0/6/130639503/kufokulad-detolol-sitofupiwa.pdf
- http://primeinstallllc.com/uploads/1/3/1/3/131379375/1cba775.pdf
- http://techlifeannual.com/uploads/1/3/0/5/130590739/fedifo.pdf
- http://adamgoodbet.com/uploads/1/3/0/5/130551126/7703514.pdf
- http://myuntoldpleasures.com/uploads/1/3/0/6/130639911/4260704.pdf
- http://mx3.ferienwohnung-freital-dresden.de/uploads/1/3/0/9/130969053/wokepulusukapalir.pdf
- http://peteroon.com/uploads/1/3/0/2/130288802/2663104.pdf
- http://mylibertybuilders.com/uploads/1/3/0/7/130776790/senekimon_juzizo_zeligoz.pdf
- http://goalscoach.info/uploads/1/3/0/6/130620698/nowukunulebesar.pdf
- http://dublintantramassage.com/uploads/1/3/0/6/130604983/5332920.pdf
- http://fontawesome.iohttp://fontawesome.io/license/
- 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_off0000b021.bin` `b095009e1aa7b679086a2dd093949a1e2bfdfa179c83d9e64a20210f199a406d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB021	1544 bytes
`font_01_sfnt_off0000b791.bin` `4bc8674c065be23b158125291f55baf01b4bb9be30f5136f7127f3801c7f5faa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB791	9280 bytes

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