PDF malware analysis — malicious · b489cd23dea415d2

MALICIOUS

PDF

62.2 KB Created: 2021-01-11 09:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: f2998a648d7f8586c42d85e3570dde73 SHA-1: 68571f2385f050735c403f0767fcb9baa1d70739 SHA-256: b489cd23dea415d282fec06dab436d52d021b2cb84e7d3eacaaee5424298c43e

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to "Aerodynamics pdf notes".

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/aws?utm_term=aerodynamics+pdf+notes PDF link annotation
- https://site-1177041.mozfiles.com/files/1177041/electric_guitar_parts_list.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370530/normal_5ff5c1283c4f3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367944/normal_5fbf03f9b77a2.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387427/normal_5ff122b03b40e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456699/normal_5fa2fdba929ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367937/normal_5fd38e61204b8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374520/normal_5fe546d62fbd2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369315/normal_5f88839e534bf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457582/normal_5fa8a3d6ebf58.pdfIn PDF document text
- https://site-1168300.mozfiles.com/files/1168300/download_game_idle_tap_strongman_mod_apk.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/sefiwegegagu/dr_jart_sheet_mask_for_acne.pdfIn PDF document text
- https://s3.amazonaws.com/gaxuremewuger/ruxar.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_off0000b6b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB6B8	5360 bytes
SHA-256: `8a970144baa5740b9d109cd5418f46de8fcfe6fb526b2270f2527b16ed3f1bb2`
`font_01_sfnt_off0000c8eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8EB	10484 bytes
SHA-256: `f74ff0a71898956ed8cc656a742bfedb472897080d4b051900c0f64b2134b442`

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