PDF malware analysis — malicious · d9cba42e8a0b74d4

MALICIOUS

PDF

80.5 KB Created: 2021-03-29 04:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 429cd7d2c79da358d9a1439f63a4d7a9 SHA-1: 9d0be21f017e5b7e8cc6be31f427f5844350f771 SHA-256: d9cba42e8a0b74d470dd6f037f601ae7b536539865da3bd6a68dd82f95fec6aa

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, a common tactic for phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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://bologen.ru/wix?keyword=digraph+th+worksheets+first+grade
- http://xamoxipuwizutux.scienceontheweb.net/jawovijozubonigedupuneku.pdf
- http://kepuxom.mypressonline.com/marlin_336_rc_30-30_owners_manual.pdf
- https://galekogikelubem.weebly.com/uploads/1/3/1/4/131438025/fivapojejibo.pdf
- https://rituzanasalu.weebly.com/uploads/1/3/4/7/134718781/4468067.pdf
- http://talemine.getenjoyment.net/10436150764.pdf
- http://kusafomidufe.mywebcommunity.org/3064751094.pdf
- http://rumepado.mypressonline.com/biostatistics_short_notes.pdf
- http://matizaw.mywebcommunity.org/modern_boy_baby_names_in_tamil_2020.pdf
- http://xuzevofut.22web.org/brainspace_magazine.pdf
- http://lapitubemexidi.mywebcommunity.org/40257941507.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/gixirojozogufux/jiwikesavusofosopovobom.pdf
- http://popofisofol.myartsonline.com/potajaju.pdf
- http://zaxawogaxema.epizy.com/gattu_battu_remix_song.pdf
- https://s3.amazonaws.com/xeropizuwe/53039612237.pdf
- https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_8fd61ddc67c84271a878f2688e42e71c.pdf?index=true
- https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_50cea9b26ccf4e45a974f47fc08c15d7.pdf?index=true
- http://xepatodop.onlinewebshop.net/16829439975.pdf
- https://s3.amazonaws.com/wonumafubij/windows_10_version_1803_issues.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fdd3.bin` `b08c33e085e66690f50f50d9ccf75f471238db195dc43bea35d24bd160c407f4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDD3	5428 bytes
`font_01_sfnt_off0001105e.bin` `12b9f6174a0c97a1e26ea78f27524ed011f5e14d99a0dc4c1773153a933262a6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1105E	10728 bytes

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