PDF malware analysis — malicious · 036500cde8e54a01

MALICIOUS

PDF

60.1 KB Created: 2020-04-06 06:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: d7afa5c73f635cb6fa54e45076387c4d SHA-1: 66c86df0a63a2cdb348538a911bd92276941526c SHA-256: 036500cde8e54a011137d54cbaddd7191c826de9f54fa2404f69c639e8db4c76

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF file exhibits characteristics of a link farm, embedding a large number of external URLs pointing to other PDF documents hosted on various domains. The primary goal appears to be SEO manipulation or potentially distributing a payload through these linked documents. No scripts were extracted, but the sheer volume of external links suggests a malicious intent to redirect users or host malicious content.

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://nicholasreinhartpresents.com/uploads/1/3/1/4/131437243/131437243.html#shaolin+kung+fu+near+me
- http://connadh.com/uploads/1/3/0/7/130739583/xefujowowozuveta.pdf
- http://mail.franklinvetclinic.com/uploads/1/3/0/5/130590432/xojelazuwugoporub.pdf
- http://kateshawauthor.com/uploads/1/3/0/7/130739037/pufememarosif.pdf
- http://mrs-mills.com/uploads/1/3/0/4/130483756/fuvav.pdf
- http://nourks.com/uploads/1/3/0/7/130738794/nevemisujoli.pdf
- http://lindsay-hollie-2018.com/uploads/1/3/0/4/130488312/2652736.pdf
- http://activateyourblackgirlmagic.com/uploads/1/3/0/7/130776304/zasuliva_gobasixusobunu_kavozetikowu.pdf
- http://eaincense.com/uploads/1/3/0/8/130813604/6e4cd2b36.pdf
- http://mysimplysouthernhome.com/uploads/1/3/0/8/130874610/rimuzisipelipatu.pdf
- http://endgrainfinishings.com/uploads/1/3/0/9/130969853/tedunazu.pdf
- http://upowerpro.com/uploads/1/3/0/4/130483980/tumanuv_bonuv_xulimenadug_figojukof.pdf
- http://metalfinished.com/uploads/1/3/0/7/130775596/nitoxaxugo-besolototafek-losukenibuji-gumena.pdf
- http://rimadylforless.com/uploads/1/3/0/4/130483338/9132310.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://www.adobe.com/).Noto
- http://www.google.com/get/noto/http://www.adobe.com/type/This
- http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006f2a.bin` `ffbc9a1ac61ed7690e6a1acd81d61f05e18304b22f3df9d3d18b15f773048aac`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F2A	8052 bytes
`font_01_sfnt_off00008e16.bin` `e758d384db1ee12a63511d5f87a2460cd82fd5d0efec10e5b1b5fb4606148656`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E16	27256 bytes

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