PDF malware analysis — malicious · 6344cf4444a04614

MALICIOUS

PDF

70.4 KB Created: 2021-01-08 14:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: af90d9924b771f3b50fdaf118cbeba52 SHA-1: e24ff51fa29e53a01938e34534b5b55d7012a591 SHA-256: 6344cf4444a04614b532c52fe063759736554dcf4febfc2bf0b046e4dd2fea36

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to a 'Blowtherm control panel manual', suggesting a phishing or social engineering attempt to drive users to the malicious URL.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=blowtherm+control+panel+manual PDF link annotation
- https://cdn-cms.f-static.net/uploads/4487905/normal_5fbc241bda805.pdfIn PDF document text
- https://cdn.sqhk.co/xakatikakizi/ihiiai2/82671246283.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380379/normal_5f92264853665.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459025/normal_5fb4613d17411.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415935/normal_5fb263da3e6f3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428069/normal_5faacc9c2d00a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484169/normal_5feb8c91e295e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389571/normal_5f9886e799cdf.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/43007f3b-167a-470d-bc91-574884275d9c/dedokevopekafukixikis.pdfIn PDF document text
- https://s3.amazonaws.com/fuwawibu/isaimini_movies_2019_2018_free.pdfIn PDF document text
- https://s3.amazonaws.com/sefukirexuwekij/24401353063.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_off0000d76c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD76C	5136 bytes
SHA-256: `48f46553474ffba5a3716241c8079ba4f7f1b5c330b788f0c038d565159e76c4`
`font_01_sfnt_off0000e8cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8CC	10636 bytes
SHA-256: `db3e38cfdb621d9d4333854f121c1070faa37e924fd2ffbb9369ccc115ca1664`

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