PDF malware analysis — malicious · 109f3bc45768017a

MALICIOUS

PDF

69.9 KB Created: 2021-04-07 15:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 6ffaa0de1014a13ef92efeff9c3dbdac SHA-1: dff1ed5ee379d5290f7700640e6e9f9b173b767e SHA-256: 109f3bc45768017adb1ffb04d6fadf9c7f2146abf567b99956fef46afd01cefe

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, including one pointing to 'cicatsalud.com', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with common phishing lures.

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://ambrose.edu/sites/default/files/webform/sovurusogizafubeb.pdf In PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/99284441703.pdfIn PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/86929885116.pdfIn PDF document text
- https://www.uts.cw/sites/default/files/webform/89737617204.pdfIn PDF document text
- http://klm3fg.grhosting.cz/sites/default/files/webform/files/56601188302.pdfIn PDF document text
- http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/12812059159.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/juremetepatofuf.pdfIn PDF document text
- http://www.sumnercountyhospital.org/sites/default/files/webform/bavowusakixonodokuja.pdfIn PDF document text
- http://klm3fg.grhosting.cz/sites/default/files/webform/files/16831560309.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=difference+between+poisson+cdf+and+pdfPDF link annotation
- https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/46273532178.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_off0000d36a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD36A	5348 bytes
SHA-256: `09d927e3bd64a18c0d11dda6de40701e16986fd8c31f4b55e2d0076f9711da3b`
`font_01_sfnt_off0000e5bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5BC	10900 bytes
SHA-256: `b569d2183b8e399e7fa60b8f942cec2818de2e657ba59ec5773b076997f7cc42`

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