PDF malware analysis — malicious · 356c58544b6cf17f

MALICIOUS

PDF

66.1 KB Created: 2020-11-10 15:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 90be61ad57c973d974947b4271fa079a SHA-1: 7eed8766bbd3163ff6f5094d86a6baebef8a1453 SHA-256: 356c58544b6cf17fc17332ac2808f894d9235c03335da7d23cdf99c42b89c7e1

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI that points to a suspicious domain, likely intended to deliver a malicious payload or redirect to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit user interaction, aligning with spearphishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?keyword=chemistry+raymond+chang+13th+edition+answers PDF link annotation
- https://kegozogoro.weebly.com/uploads/1/3/4/5/134525602/vovosugox.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495262/normal_5faa36b45a484.pdfIn PDF document text
- https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/2bbfb57b8.pdfIn PDF document text
- https://rebolotor.weebly.com/uploads/1/3/4/3/134364816/13df0b560ca.pdfIn PDF document text
- https://xabomipa.weebly.com/uploads/1/3/4/4/134484571/wuzonekosove-xunolezufagu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369158/normal_5f8ee661929c4.pdfIn PDF document text
- https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453560/normal_5faa6376665ba.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372737/normal_5f92472164d0c.pdfIn PDF document text
- https://testbankservice.com/wp-coIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/tadovu/wilfred_owen_dulce_et_decorum_est.pdfIn PDF document text
- https://s3.amazonaws.com/suxugipipolazog/star_timesheet_wi.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_off0000c1e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC1E5	5636 bytes
SHA-256: `b4b6874c0a24755ba06bc93ac3ca23bc6a408cbf94941a7c6c739addc3116584`
`font_01_sfnt_off0000d4fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4FE	11580 bytes
SHA-256: `b559c6929340772cc900c48cc1728801e28ff95887e400ca6a41209176557a35`

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