PDF malware analysis — malicious · aec30eb38f873cf6

MALICIOUS

PDF

71.3 KB Created: 2021-02-20 18:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fb6a53ed7c1d9e5b95d298ace7febd87 SHA-1: dbb54a13deed8d9ac8b7d7149424796a8ce858e3 SHA-256: aec30eb38f873cf6135857a3e14d45a78a8ec10948294c086ddbcd6429aede3c

116 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains an embedded URI pointing to a suspicious domain, and the document body, though heavily obfuscated, suggests a lure related to 'Monster Hunter Stories'. The presence of multiple external URLs further supports a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://jacksth.ru/wix?keyword=monster+hunter+stories+qr+code+list
- https://ludamezowi.weebly.com/uploads/1/3/4/1/134131800/1c92af6f.pdf
- https://kanevedodusuwa.weebly.com/uploads/1/3/0/8/130814441/jawazupivowiluda.pdf
- http://gufutaca6.xyz/33275002638nr1dc.pdf
- http://front-glass.website/swot_analysis_of_nokia_phonetix8s.pdf
- https://cdn.sqhk.co/jaguwubax/0SrNVcG/jenapoxakavujunoposoru.pdf
- http://rostov-mobile-doctor.ru/65804997352vj339.pdf
- https://static.s123-cdn-static.com/uploads/4463785/normal_5fcde1c18091a.pdf
- https://cdn.sqhk.co/xurinuwame/gYigsjj/national_geographic_kids_spiders.pdf
- https://cdn.sqhk.co/fuzomorikat/gdajijf/35759084472.pdf
- https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/7090258.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://gizimup.epizy.com/tobafasifoludiferi.pdf
- https://s3.amazonaws.com/fidefofudi/adobe_premiere_pro_cs6_warp_stabilizer.pdf
- http://mulozeraxepe.epizy.com/87282206593.pdf
- https://s3.amazonaws.com/davubewu/54186126686.pdf
- https://s3.amazonaws.com/tokafanawa/learn_actionscript_3.pdf
- http://retuguru.epizy.com/wow_classic_druid_leveling_guide_ign.pdf
- http://kimatun.epizy.com/64399739121.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_off0000db58.bin` `6c294bcf8bd5bdee6d3729a27ca21e1760741b1eb35fc8c942bedd93424a4537`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB58	4948 bytes
`font_01_sfnt_off0000ec2f.bin` `2359d51e12b7c617f465fce15dc38b232c59a5de19d010010f1fa946f76fa726`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC2F	10536 bytes

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