PDF malware analysis — malicious · cc90f45cbaf5aadb

MALICIOUS

PDF

66.0 KB Created: 2020-12-28 06:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 6b3c6cf62e80136a3c4d62f11aa5e5ff SHA-1: d808e1ff80ffb220c15bfabe0a9fb5471b7c5d8d SHA-256: cc90f45cbaf5aadb31ab9b277e1e5375c6e616c3f0ff1139d200762e90a7a773

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs the user to a site related to job searching, likely a lure. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing attempt to redirect users to a malicious site.

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://trafftec.ru/strik?utm_term=petroleum+engineering+jobs+in+texas+salary PDF link annotation
- https://cdn-cms.f-static.net/uploads/4374979/normal_5f8a62a9ac915.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471706/normal_5fada1c55006c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450038/normal_5fcd7697a2fc7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366319/normal_5fbf78405cb1a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488804/normal_5fe91232143a6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412900/normal_5f97237edfb4e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408598/normal_5f98e849573a9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421630/normal_5fdbcd6a628b1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420034/normal_5fc5a8f8948e5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415962/normal_5fd33b8c8204c.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/tudawufed/88455253096.pdfIn PDF document text
- https://s3.amazonaws.com/bejikefowu/basic_communication_engineering_book.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_off0000c42b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC42B	5392 bytes
SHA-256: `446a43828ee4a4177b3d4e7529372049db2124ef14c5672050daacf552799839`
`font_01_sfnt_off0000d677.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD677	10756 bytes
SHA-256: `45d0eb34d8f313856e83eb39ba12dd30ff7cb8c13a76049e8114c7a62365de48`

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