PDF malware analysis — malicious · cd1458662ab8bb05

MALICIOUS

PDF

71.3 KB Created: 2021-01-08 14:11:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: b2e88b49f22bbe88900717787906b5c1 SHA-1: e228ca48d6614bcfd847fae04b219943163375b0 SHA-256: cd1458662ab8bb05e42490cae6d4575850db18a8514897370670ebd5b08066cb

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://traffset.ru/123?utm_term=hurst+rn+review+book', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure itself does not contain readable content, but the presence of the external URI and the malware detection strongly suggest a malicious intent, likely related to spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/123?utm_term=hurst+rn+review+book PDF link annotation
- https://static.s123-cdn-static.com/uploads/4473035/normal_5ff64db7a1fbb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379726/normal_5ff691952fc6f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382639/normal_5fbaab829d1b5.pdfIn PDF document text
- https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/silaj_xetosamumopojum_xaginomax.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491169/normal_5fbef979be22f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421787/normal_5fcf597a5e41b.pdfIn PDF document text
- https://rodibafabe.weebly.com/uploads/1/3/0/7/130738722/vasisosasezudep.pdfIn PDF document text
- https://weritesi.weebly.com/uploads/1/3/5/3/135314652/2131001.pdfIn PDF document text
- https://tebivozov.weebly.com/uploads/1/3/2/7/132740763/wewetaxile.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379048/normal_5f967c1b33d21.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d9f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9F5	4756 bytes
SHA-256: `e879a4347317024cccde6611564d936ac1f62bee1cbbf8dd77d704720e60da46`
`font_01_sfnt_off0000ea47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA47	11424 bytes
SHA-256: `b0934ae70acdaeaf6b9b3ec11621062910be6b876b90c0df47ff34a2588d9e83`

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