PDF malware analysis — malicious · 3d5fc444bc81cc90

MALICIOUS

PDF

73.4 KB Created: 2021-02-17 08:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 40430a5000416bda42a7b7ff298782b4 SHA-1: 5c0a7eadee6ff5f0afe57716b0e413b29831d306 SHA-256: 3d5fc444bc81cc908c4dfd113a7f115b01733722c0d062e57c461e57a769a47e

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs and a visual download button, suggesting a social engineering attempt to trick the user into downloading a secondary payload. The presence of external URIs and the ML classification strongly indicate a malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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=gizmo+assessment+questions+answers+solubility+and+temperature
- http://varistop.site/70460455800a0ihr.pdf
- https://cdn.sqhk.co/giboxikewev/Nibigjg/37976516795.pdf
- http://qwertyujg.xyz/sum_of_finite_geometric_series_worksheetyyngw.pdf
- https://cdn.sqhk.co/nobukomorur/iiogdji/vulurupas.pdf
- http://galoomer.online/cfpb_examination_manual_20188g16h.pdf
- https://cdn.sqhk.co/jasekazus/feBNluE/zixaworesusewimijifefino.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/lusabifef/pleco_chinese_dictionary_apk.pdf
- https://s3.amazonaws.com/jezekemunidup/european_gastroenterology_guidelines_ibs.pdf
- http://magixuzam.epizy.com/crossword_puzzle_answers_crossword_heaven.pdf
- https://s3.amazonaws.com/tonisefoteka/simulador_ser_bachiller_2018.pdf
- https://s3.amazonaws.com/nilititonawafim/hello_print_business_card_template.pdf
- https://s3.amazonaws.com/xebuvuwov/tebunojuvafiluxidoxip.pdf
- http://likebisuwuselo.rf.gd/escalation_process_template.pdf
- https://s3.amazonaws.com/tenunud/71450175483.pdf
- https://s3.amazonaws.com/rudelazifizuvo/83398411409.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_off0000e01a.bin` `f981280635d1d6d9f7ded450805939bc0e07df5d18403d17ab38c69c68718c85`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE01A	5648 bytes
`font_01_sfnt_off0000f34f.bin` `49f0dd758750500a3565c27cd893f67b76025edea564a5510d7b7fc6602f01e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF34F	10812 bytes

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