PDF malware analysis — malicious · 72cf3ddda5fc2016

MALICIOUS

PDF

64.4 KB Created: 2021-04-02 06:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 099af97264f86057b090ea6d14e42779 SHA-1: 1bdb5a2c2dea2e4776b019e80c3c0aeb7b9c6acb SHA-256: 72cf3ddda5fc201668dc9bb429a0bfe265b6c391e43d0a73f73b70c341797adf

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains embedded URIs, one of which is explicitly flagged as an external URI. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Purdue master gardener manual", likely intended to trick users into visiting the embedded malicious URL.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://golowaki.ru/wix?keyword=purdue+master+gardener+manual
- http://sepoxudozixo.sportsontheweb.net/33850863927.pdf
- http://daating19.site/icecream_converter_for_pcmcrpr.pdf
- http://nefritthebestthing.site/2004_ford_focus_hatchback_modelsag8lo.pdf
- http://saburogamo.iblogger.org/numbers_in_spanish_exercises.pdf
- https://balexasureg.weebly.com/uploads/1/3/0/8/130874281/rumizu.pdf
- http://naturka.space/surah_yusuf_download_freefgzz6.pdf
- http://ibkreactiva2020.com/nimirivatu07rnn.pdf
- http://sport-stavki.fun/bufipafaguxanexolubatdeke8.pdf
- http://baliferifopiz.mypressonline.com/formato_de_minuta_de_trabajo_editable.pdf
- http://segwaywheelchair.ru/x4_defense_platformde3a4.pdf
- http://wizuvadidena.iblogger.org/sidib.pdf
- https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/pojivivolizejanober.pdf
- http://sberin.xyz/2011_dodge_avenger_v6_battery_sizey80xf.pdf
- http://lorem.space/how_to_remove_delta_monitor_shower_handlexi13m.pdf
- http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
- http://6gusevshop.space/22642283850qj7if.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/risalenefazozo/30430068083.pdf
- http://nuvavevuk.rf.gd/singapore_math_online_resources.pdf
- https://s3.amazonaws.com/boduxatavepe/vivafiposowexazofavaguvob.pdf
- http://banebogol.epizy.com/cedar_city_weather_report.pdf
- https://s3.amazonaws.com/wozoxub/tidabomonajibizefef.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_off0000bfce.bin` `a952c5fea9eb4376c3b43cd5a79aeedb8d5fa7ffb02c3146f19cf1011381bbb5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFCE	5144 bytes
`font_01_sfnt_off0000d131.bin` `a11b6c1916231770912154c2c1ccda8067feab47b05f043a49407672b574d83e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD131	10344 bytes

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