PDF malware analysis — malicious · 32badfca99d1d2f1

MALICIOUS

PDF

131.5 KB Created: 2021-03-28 21:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9d05ea7c9dcea6f5706bf13c0625a1f3 SHA-1: e05b46b89a89941d5aafa0a4d771a7772f26bfd0 SHA-256: 32badfca99d1d2f15f0891a3ef3755cf674f05b927ffc49891e889c157ad689b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine rankings or direct users to malicious content. The primary malicious URL identified is vilenefex.ru, which is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9489

Heuristics 5

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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 https://vilenefex.ru/strik?utm_term=what+does+the+term+didache+mean
- https://cdn-cms.f-static.net/uploads/4365653/normal_602d3a01303b9.pdf
- https://static.s123-cdn-static.com/uploads/4369506/normal_5fc67c7423702.pdf
- https://static.s123-cdn-static.com/uploads/4459323/normal_5ff802a2d40df.pdf
- http://ximasoj.22web.org/hiv_test_report_time.pdf
- https://cdn-cms.f-static.net/uploads/4402933/normal_6035f247f2a3c.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- http://fedorahosted.org/lohit
- https://uploads.strikinglycdn.com/files/e9431361-dbe1-46b9-92d0-6f8b06d5e8df/4942015773.pdf
- https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_bf2b1c32fa434c5a9e27ddd53cb28b2a.pdf?index=true
- https://uploads.strikinglycdn.com/files/f7e72ecb-0fc0-4508-ab59-8fdc825a352c/dream_interpretation_websites_free.pdf
- https://uploads.strikinglycdn.com/files/930763ff-4af2-4a59-9a04-a92bef7bc5fa/42290216022.pdf
- https://s3.amazonaws.com/dorulusof/pugenetajetivera.pdf
- http://xanojeja.rf.gd/how_to_become_a_registered_nutritionist_in_australia.pdf
- https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_67cd106c78b340619a38523ea7346303.pdf?index=true
- https://s3.amazonaws.com/nowonovege/catia_details_full_form.pdf
- https://s3.amazonaws.com/bitizopovopaso/celestine_prophecy_experiential_guide.pdf
- https://s3.amazonaws.com/tesodagiwor/zaduziwedowu.pdf
- https://uploads.strikinglycdn.com/files/3ad346e3-321d-4ae8-80a1-f21638641e9b/46267329064.pdf
- https://uploads.strikinglycdn.com/files/38e60a26-1367-4825-b5b8-66a38562739c/70605126503.pdf
- https://uploads.strikinglycdn.com/files/434eaac1-9835-4c37-a37f-5fbb07a1b5e2/53956544580.pdf
- https://uploads.strikinglycdn.com/files/ba6c6a9b-d93b-45d3-b011-2ea9ca86dad6/forugin.pdf
- https://uploads.strikinglycdn.com/files/bb578dea-82fd-411a-8745-52f01faef0c2/neverending_story_3_full_movie_download.pdf
- https://s3.amazonaws.com/simujix/trigonometric_substitution_integrals.pdf
- https://uploads.strikinglycdn.com/files/61f0d6bf-e918-48bb-a8bd-2d3ec6cef6e0/99972666834.pdf
- http://pulijivugis.epizy.com/87199089934.pdf
- https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_0674e48a43d343a99c547fa861b69730.pdf?index=true
- 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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00017599.bin` `642e2ce412034e7ddd1d0e7bc81dc5a5421d78d5bc5b9d85eb6f98c9f91e37b6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17599	5312 bytes
`font_01_sfnt_off00018832.bin` `6ad89b7857b7eccea9a7ecbb2e9e994292bbf2ca14f2a688d0f68a23bfb5e3b0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18832	4948 bytes
`font_02_sfnt_off000198e0.bin` `c0c146d4cdf557401ce587df1869b0d149746f4911f72f025309ba18c9857200`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x198E0	17304 bytes
`font_03_sfnt_off0001cc26.bin` `b63cbe21f402d8c38aa82aedc8bbaa0d1dcbdc460226a631eb26a63427c24f22`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1CC26	16600 bytes
`font_04_sfnt_off0001e317.bin` `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E317	4324 bytes
`font_05_sfnt_off0001f117.bin` `b88005fa2fe88f21b7ebc277f32137114ffdb80c940205536051dfccd162a54c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F117	2668 bytes

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