PDF malware analysis — malicious · c64aaa19a68e3729

MALICIOUS

PDF

110.8 KB Created: 2021-03-14 16:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8400527b28c7f17e114984fb562d3f51 SHA-1: 1c52af39a013892a3d3e9e3ea1c80ef8a024e632 SHA-256: c64aaa19a68e3729d7014d61094b2d299325b9e6e04287ae261ad70ea4c12c25

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The embedded URL and the ClamAV detection further indicate malicious intent, likely phishing or hosting malicious content. No scripts were extracted, but the structure and heuristics point to a malicious PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9770

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://dafemum.ru/award?keyword=magazine+pdf+telegram+channel
- https://cdn.sqhk.co/jobezivozuf/fU3R0SS/loudoun_now_obituaries.pdf
- https://sewusadata.weebly.com/uploads/1/3/5/4/135401056/ba7869.pdf
- https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/777858.pdf
- https://cdn.sqhk.co/buvaboda/ahbibge/fezadudigo.pdf
- https://cdn.sqhk.co/gibebomesani/if9D37V/furemazojula.pdf
- https://cdn.sqhk.co/litazujizime/7oImhWY/overkill_the_dead_survival_apk_mod.pdf
- https://cdn.sqhk.co/lapefuxolu/jiAsiio/ziwugaf.pdf
- https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/7034576.pdf
- https://cdn.sqhk.co/dadirowuj/ANhf20o/ninja_coffee_bar_cleaning_flush.pdf
- https://cdn.sqhk.co/dokiladigana/a8myHRb/moto_g_power_price_philippines.pdf
- https://cdn.sqhk.co/xezufulozuwo/cjf6gTF/95914158128.pdf
- https://cdn.sqhk.co/petebeki/iijdgdu/rikujivajibisovatuja.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://fedorahosted.org/lohit
- https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_a91c046ec0504010923f6e0a5497c7b4.pdf?index=true
- https://uploads.strikinglycdn.com/files/c5c60354-f724-4317-b353-718cb9c7a7d7/timowubuwonigin.pdf
- https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_49f8dc9f3d744038a1feda6539a62c10.pdf?index=true
- https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_e366384fbb7544d58561b5d77a8a7831.pdf?index=true
- https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_0d258c40f4834299bab30e5e8002ad42.pdf?index=true
- https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_d4d871f1e2d54758a7f121914a257405.pdf?index=true
- https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_e7c98dfbdf494d41bc37ef409d75d4f3.pdf?index=true
- https://uploads.strikinglycdn.com/files/4441f6e1-cb8c-448c-8adb-3475c1a131c6/93049220503.pdf
- https://uploads.strikinglycdn.com/files/4ff62dbe-0919-49b8-8971-75f0692da89c/memojiminoruverovuliv.pdf
- https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_bce470f9580c476c8e51b8fe9f7b9440.pdf?index=true
- https://uploads.strikinglycdn.com/files/52674aeb-733d-445c-805a-204c4dd776d1/8889122670.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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f866.bin` `52c3a75fb647145c916aee13f84f469d9be4ec97ccbdb755d1412f0911658698`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF866	3028 bytes
`font_01_sfnt_off00010323.bin` `d285300731c7aef718ddf2057e8cef957bf96a3fc582b65ff82a4d89af464e85`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10323	5444 bytes
`font_02_sfnt_off00011594.bin` `a81e6163156cba80c319bf517769d557737417e92940a87db2f1a7f3b364994b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11594	10376 bytes
`font_03_sfnt_off00013337.bin` `786d62c2a94379ad88d3d9264bc606e37edfa288016dda0eedcb7fe5e80136bb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13337	12152 bytes
`font_04_sfnt_off00015ccf.bin` `bec218a71b51535ff4a62bdfc4334e1c104168c51eef68689c95079f658aa5c0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15CCF	17816 bytes
`font_05_sfnt_off0001779f.bin` `ac9df34758bc8b47276d3a8f64ec872d32c297f4a54602625e92bb9cfcb0e8cd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1779F	19016 bytes
`font_06_sfnt_off0001967c.bin` `e5812e991a3439bdab68e8397277dd1621013afb5b40f7b0460a2cca404fd6e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1967C	5188 bytes

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