PDF malware analysis — malicious · 93161431b4a48da2

MALICIOUS

PDF

70.1 KB Created: 2020-11-13 23:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 56ea4a4ae27cf060b56077ab9ffda31b SHA-1: 117ef126dfb8b0c7ddd3b7bb436f7c466cdc5182 SHA-256: 93161431b4a48da22a50865e631a84e8fc4a1c957d86442797019a7d06d80684

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafficel.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'Gene therapy cystic fibrosis case study answers'. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=gene+therapy+cystic+fibrosis+case+study+answers
- https://gojodisob.weebly.com/uploads/1/3/4/6/134664442/ripofuburowow_bivuz.pdf
- https://cdn-cms.f-static.net/uploads/4375353/normal_5f9472c738aaf.pdf
- https://cdn-cms.f-static.net/uploads/4384164/normal_5f8e74a66a212.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://uploads.strikinglycdn.com/files/0f876fe3-0685-4db5-9ab9-e3d9f02523cc/forever_painless.pdf
- https://s3.amazonaws.com/mesotodimus/international_resistance_to_apartheid_essay.pdf
- https://s3.amazonaws.com/fapaga/10282737781.pdf
- https://s3.amazonaws.com/kagedatabujo/jebowuvakokomeze.pdf
- https://uploads.strikinglycdn.com/files/24a40062-ff22-45d4-bce5-a34289bfdfeb/spanish_2_4a_test_answers.pdf
- https://uploads.strikinglycdn.com/files/d0a92e34-ebe8-4efa-b292-f06c1a18deeb/85782247879.pdf
- https://s3.amazonaws.com/divelatoxa/misa_alina_dress.pdf
- https://s3.amazonaws.com/lanorolowu/juicio_de_amparo_directo.pdf
- https://s3.amazonaws.com/bubodeliza/rain_bird_sst600in_user_manual.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ca5e.bin` `527f134dc4812a0dbc583cdb61c9aaecf0f8d442ccb067f4458c35fdfa9e4094`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA5E	5460 bytes
`font_01_sfnt_off0000dcf0.bin` `f363a9f226c14bbad46ff0bf892c73ac9e3db86b47a69464f4047b2c7527099c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCF0	9432 bytes
`font_02_sfnt_off0000fd38.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD38	4324 bytes

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