PDF malware analysis — malicious · bbd9c9f9ed59cb53

MALICIOUS

PDF

70.4 KB Created: 2021-01-12 01:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 4ee31c0a2e7c572d2c25ec49f8d02eea SHA-1: 7b34af989c5206b4f5121f41c3563ed4dc567242 SHA-256: bbd9c9f9ed59cb532aa13dbfb1f53832a255389f7e2fec76b02ccd46309aa467

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=so2+lewis+structure+molecular+geometry', which is likely a phishing lure disguised as a search result. The document body is heavily obfuscated, but the presence of the malicious URL and the strong heuristic firings suggest a phishing attack.

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/123?utm_term=so2+lewis+structure+molecular+geometry PDF link annotation
- https://static.s123-cdn-static.com/uploads/4374021/normal_5fe14e8fd77a9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4378152/normal_5ff2dac436cbe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407060/normal_5f96eb3705daf.pdfIn PDF document text
- https://cdn.sqhk.co/wekonexiw/gohClia/7905191686.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410988/normal_5f93d152382c5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379230/normal_5fec7a9dc8dc7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382772/normal_5fe8646e00ca3.pdfIn PDF document text
- https://site-1177769.mozfiles.com/files/1177769/ascendance_trilogy.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393762/normal_5fe9b70e55d97.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/difigomisosak/tebepudajudikegipi.pdfIn PDF document text
- https://s3.amazonaws.com/bulozor/guia_eroski_camino_del_norte.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_off0000d2d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2D5	5548 bytes
SHA-256: `62a3ae6e714088f1fd9f21fe5ca426c31aba7d44278a82bddcf326faae7af2af`
`font_01_sfnt_off0000e5b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5B5	11820 bytes
SHA-256: `d545800abbb32f937fccfaf6396c4cf7d9bc629f7a8cbc96b53476fb19777a2f`

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