PDF malware analysis — malicious · 868e81f46f32eed0

MALICIOUS

PDF

68.1 KB Created: 2021-04-24 11:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 1e9997b74798192171d65c2fb3e79178 SHA-1: 08f628b3160c5e2c1be49313617eb92c014094b4 SHA-256: 868e81f46f32eed0031c669a557a7b7509baf09b8f2dbc133d304a75a7aea663

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains embedded URLs, one of which is associated with a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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 http://www.pbttphtk.gov.my/sites/default/files/webform/74795851198.pdf In PDF document text
- https://aboss.by/sites/default/files/webform/10891008032.pdfIn PDF document text
- http://www.pbttphtk.gov.my/sites/default/files/webform/1232685222.pdfIn PDF document text
- http://klm3fg.grhosting.cz/sites/default/files/webform/files/78191676466.pdfIn PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/95133977644.pdfIn PDF document text
- https://www.ofalloncasting.com/sites/default/files/webform/wibojamivumararevede.pdfIn PDF document text
- http://oaklandchildcare.org/sites/default/files/webform/dakorudi.pdfIn PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/basolidigululaba.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+program+homelink+rolling+codePDF link annotation
- https://thesanfordschool.asu.edu/sites/default/files/webform/99818817157.pdfIn PDF document text
- https://thesanfordschool.asu.edu/sites/default/files/webform/63066688876.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_off0000cce4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCE4	5424 bytes
SHA-256: `6cb755ba20b6eee3d21d5f0f269364693305cc36bcf9d67854413fc79b0753bc`
`font_01_sfnt_off0000df3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF3D	10776 bytes
SHA-256: `694f828afe5b671b1ee4422adf0c9d4183c44f29b4ca63f167c0b083f5ec9c14`

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