PDF malware analysis — malicious · f9c4c29cacb2e3db

MALICIOUS

PDF

67.4 KB Created: 2021-01-26 22:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: a6529ffeb5d67f6313bdc6113b1fb91c SHA-1: 96da1bb73687d76d3955a5e7010f92ec42879b8d SHA-256: f9c4c29cacb2e3db84c898770f8c956bacd770963adbda7928ee3c1558f96737

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL points to a suspicious domain, likely intended to host a malicious payload or redirect to a phishing site. While no scripts were explicitly extracted, the PDF structure and external URI heuristic suggest an attempt to leverage embedded content or links for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=a%2527mei+kazuko+grandberry PDF link annotation
- https://cdn-cms.f-static.net/uploads/4411932/normal_5fdbd60655a39.pdfIn PDF document text
- http://im-marceting.site/viking_village_fortnite_fortbyteq3k9w.pdfIn PDF document text
- http://zevixoleg.iblogger.org/67150892354.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381766/normal_600c5f7454164.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418199/normal_5fdd10a6b80ab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393044/normal_600f8ede38567.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://wapudajikipidem.epizy.com/99469808070.pdfIn PDF document text
- https://s3.amazonaws.com/xoxaneral/xapukebadobif.pdfIn PDF document text
- https://s3.amazonaws.com/sikuva/38597328730.pdfIn PDF document text
- https://s3.amazonaws.com/xozeb/duboronovetojowibal.pdfIn PDF document text
- http://litezopufesox.epizy.com/pijixevulekowaxike.pdfIn PDF document text
- http://robebiwasufilu.epizy.com/ripon.pdfIn PDF document text
- https://s3.amazonaws.com/savukojubusum/hitachi_seaside_park_guide_map.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_off0000cb53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB53	5316 bytes
SHA-256: `18348ac807dffff858f51ed107516b1d07ec6d969eebd43a049db6915a3eb795`
`font_01_sfnt_off0000dd6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD6A	10472 bytes
SHA-256: `7ba189b8313924d169c8ccbc5f6ec7a37a37f0d25db64b2f4a65e35076f15afc`

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