PDF malware analysis — malicious · 5638ce4d1c0d2ee4

MALICIOUS

PDF

67.2 KB Created: 2021-02-04 23:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: d21d5bf5f08b532a6b807f64ab6536cc SHA-1: 05a78312d7a80a44a81a9ef92b583195fe044b44 SHA-256: 5638ce4d1c0d2ee4d13cc0a92c31ae623c18a3bbf9aca0a78002a305d8b124c6

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs, one of which is a search result page that likely leads to a malicious download. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristic firings suggest this PDF is part of a phishing campaign designed to trick users into downloading further malware.

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://bologen.ru/wb?keyword=asus%20netbook%20bluetooth%20driver PDF link annotation
- https://cdn.sqhk.co/letijefa/jgxIja1/sledziona_objawy_choroby_leczenie.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4489412/normal_5fe11348d3e5d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427103/normal_5fe64bfd9985d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366668/normal_5fd6798600c6a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411512/normal_5fceaca17e0a1.pdfIn PDF document text
- https://cdn.sqhk.co/kanedufopuma/geFn44t/povozaduwafu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4469850/normal_5fc830a0bb3fa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450141/normal_5fca49356a1cb.pdfIn PDF document text
- http://sifulodidikit.22web.org/brahms_the_boy_2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410702/normal_5fd7a4abd92a0.pdfIn PDF document text
- https://cdn.sqhk.co/ketusugedi/Ujfbhhi/41829656079.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/kelukakeb/gerufijewa.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_off0000cd3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD3D	4956 bytes
SHA-256: `cbb3477c140a9e2e70ede8c49d0c801a820e607f584d44f3e9e5af1e892502e7`
`font_01_sfnt_off0000de14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE14	10016 bytes
SHA-256: `612479f6f7159c207d99e50fec692eaadaf64ef69388e0fac23401a3f3fd6a3a`

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