PDF malware analysis — malicious · 151a2200013ffe74

MALICIOUS

PDF

70.3 KB Created: 2021-04-20 18:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29

MD5: b4d7ff18ea38ac44d4508eb10c2be147 SHA-1: 7d7ac55c0f0f9b820b953dd16bfdcad76636f656 SHA-256: 151a2200013ffe742bc67c2b02ab62add733fd68940dfe12517bb4a70436d198

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. It contains embedded URLs, one of which is part of a phishing lure. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://natsihwa.org.au/sites/default/files/webform/degajakuko.pdf In PDF document text
- https://www.enwidth.com/sites/default/files/webform/resumes/ralivowu.pdfIn PDF document text
- https://www.jts.org.jo/sites/default/files/webform/76938035167.pdfIn PDF document text
- http://spotlight-sites.com/sites/default/files/webform/wokasonexigugeb.pdfIn PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/17654710786.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=2+look+oll+algorithms+2x2PDF link annotation
- https://minorsoncampus.princeton.edu/system/files/webform/xadumiwedom.pdfIn PDF document text
- https://minorsoncampus.princeton.edu/system/files/webform/fujixedapilevunagujos.pdfIn PDF document text
- https://printandmail.princeton.edu/system/files/webform/67925993666.pdfIn PDF document text
- https://community.princeton.edu/system/files/webform/boranewibutafale.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ccbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCBE	4832 bytes
SHA-256: `e09d31971b43dcf91ef0c848757e2bc7959d7a9563018928210d6ba61be47cdd`
`font_01_sfnt_off0000dd18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD18	10032 bytes
SHA-256: `3d175877e6cf2bb1ca152e39bf9d32048742dab218580ea416b5e2f61ef76808`
`font_02_sfnt_off0000ff67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF67	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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