PDF malware analysis — malicious · 81341ae869f143f9

MALICIOUS

PDF

73.7 KB Created: 2021-03-02 16:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03

MD5: 284a4f4573a7ba43206d9fe5d27f08fe SHA-1: c93da0e4b633d2a08d2f2e3b38c03cfa774f3048 SHA-256: 81341ae869f143f92f9f340f80c56a3694cadc4a03adc97e229b243c3f4c84ea

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI that points to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to car backfires, suggesting a lure to a malicious URL.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=what+causes+backfire+through+carb PDF link annotation
- https://cdn.sqhk.co/kajurineg/aihgcek/99037223343.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501364/normal_5ff07588452af.pdfIn PDF document text
- https://cdn.sqhk.co/tilafukefuwe/fjjl4gd/53151471848.pdfIn PDF document text
- https://cdn.sqhk.co/xopigotax/hfoFgcl/xegijanaruvej.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420766/normal_5fe114d56b4fc.pdfIn PDF document text
- https://cdn.sqhk.co/bimonabozo/mgfiehc/snow_moto_racing_2019_freedom_trophy_guide.pdfIn PDF document text
- https://cdn.sqhk.co/dogutadova/aidggjb/short_adventure_stories_in_english_for_class_6.pdfIn PDF document text
- http://zizodoroluxonaf.sportsontheweb.net/vujagasikixibevawoxevijej.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471960/normal_60329c9da0469.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://zikoliduxa.atwebpages.com/7593408620.pdfIn PDF document text
- http://sitafefisoju.atwebpages.com/fekebaguloletu.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e324.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE324	5328 bytes
SHA-256: `29b02feb803dd2b2bbb7d17e3e46122a9ba67fcab25fb1714137e15e98c91b8f`
`font_01_sfnt_off0000f552.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF552	10924 bytes
SHA-256: `74b53b96fe9e8b20db319c76a4b5aa229540787108b58f5e90879f1f6806e414`

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