PDF malware analysis — malicious · 8b3af4a515f5389e

MALICIOUS

PDF

67.6 KB Created: 2020-12-06 18:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 457b8edc1c76f5e1c885e61cad17310e SHA-1: d9fb80117dfd72eafbd8780993a44780abbf9c05 SHA-256: 8b3af4a515f5389ec8b0519d6af334ed670962c4daeb6f9ea3c1a1382dbe07ec

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 strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be related to a book PDF lure, consistent with phishing attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/aws?utm_term=effortless+mastery+book+pdf PDF link annotation
- https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/luwulif_zojen_lefoxer_gukoruvifurof.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/73b3aaf1-e319-4567-adb3-121383244756/rasinuduralafufixi.pdfIn PDF document text
- https://s3.amazonaws.com/vukumesoj/nobekegetixivu.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc0bc0f405d5340f328bb30/t/5fc0db18eaf37e3b64bbc3ac/1606474522373/219956446.pdfIn PDF document text
- https://s3.amazonaws.com/nijudow/windows_movie_maker_2016_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/caa0101d-4c6f-4cab-8e6f-f65f452cc531/sikokeb.pdfIn PDF document text
- https://s3.amazonaws.com/sesafefanulokam/67392517621.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a411e367-a07d-485a-9e68-6ae81e062823/brittle_deformation_geology.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b50b5925-7547-4ded-acf1-2739a095b139/27117422182.pdfIn PDF document text
- https://s3.amazonaws.com/veraxawewib/kurevuj.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_off0000c9d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9D9	5448 bytes
SHA-256: `49ed9edb451e43a181ee6be3cbfe02bcfb10cd6b8e22f14eab2b82240613381e`
`font_01_sfnt_off0000dc56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC56	11068 bytes
SHA-256: `f62a527c4768d1f4ed2c901b4a72561bffbf3eaeb5f8069d5558fd371db4ab57`

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