PDF malware analysis — malicious · b99a24c292317b4e

MALICIOUS

PDF

137.8 KB Created: 2020-12-24 22:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: a4b3deba77459261af87003b5824d824 SHA-1: 566d950920dffe83beb947e112d63cd5da340abb SHA-256: b99a24c292317b4e30fbcdde132640f590117a704e866ae1b20005a83fa5195b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI, https://trafffi.ru/123?utm_term=rusty+lake+roots+walkthrough+last+dance, was found embedded within the document, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a legitimate document.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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/123?utm_term=rusty+lake+roots+walkthrough+last+dance PDF link annotation
- https://cdn-cms.f-static.net/uploads/4381091/normal_5fbcce85b1a79.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463009/normal_5fd8f4b80ff4f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411926/normal_5fda32cec826c.pdfIn PDF document text
- https://cdn.sqhk.co/sukurorezib/E0ieePA/mp3_cutter_and_ringtone_maker_app_download_uptodown.pdfIn PDF document text
- https://cdn.sqhk.co/baxemazisod/PidjgiH/10169473878.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/tadovu/6621463861.pdfIn PDF document text
- https://s3.amazonaws.com/firigugixujotov/47636089740.pdfIn PDF document text
- https://s3.amazonaws.com/lorifawuvawot/6766528821.pdfIn PDF document text
- https://s3.amazonaws.com/nuselufuzo/53148735919.pdfIn PDF document text
- https://s3.amazonaws.com/fosagobomap/52878838117.pdfIn PDF document text
- https://s3.amazonaws.com/luworizesupox/movozoluzizituz.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_off0001e05d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E05D	5464 bytes
SHA-256: `f5ec9227442818b23989bf3dbc2357586cffb56d2d101b39c102632aaaff9915`
`font_01_sfnt_off0001f30e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F30E	11384 bytes
SHA-256: `807ca183a35c99c8646460de45421de1ec89d05429ff1574870ced01fa991443`

Open this report in the interactive analyzer, or submit your own file for analysis.