PDF malware analysis — malicious · eacef757a4a0a278

MALICIOUS

PDF

71.6 KB Created: 2021-03-30 16:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ca0bf40f8d0e37ab25c1a616b7c33a48 SHA-1: 3e007804817b1af59833968cb4d904748f3121d9 SHA-256: eacef757a4a0a278678555bc4732c7be96d28850721b30d66c305e626b414edc

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external links points to 'nipisod.ru', which is likely part of a malicious SEO scheme. The file's content, though appearing benign, is a lure to direct users to these external resources. The presence of PDF_SEO_LINK_FARM and PDF_URI heuristics strongly suggests a phishing or spamming campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.8129

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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
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://nipisod.ru/aws?utm_term=how+to+make+a+homemade+toga+dress
- https://cdn-cms.f-static.net/uploads/4403937/normal_6052460504bf8.pdf
- https://static.s123-cdn-static.com/uploads/4370051/normal_5fc62dcedd1d1.pdf
- https://cdn-cms.f-static.net/uploads/4427783/normal_6026cfb55de74.pdf
- http://sivelural.mygamesonline.org/sigmund_freud_psychoanalysis_dream_interpretation.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/jojitagifuva/dyson_vacuum_repair_stores.pdf
- https://s3.amazonaws.com/somamere/78334284482.pdf
- https://s3.amazonaws.com/dojivewobasuval/lawavozojewofenavamar.pdf
- https://s3.amazonaws.com/juwofuxufijup/83413275135.pdf
- https://s3.amazonaws.com/zisulamisozoto/lab_conservation_of_momentum_worksheet_answers.pdf
- https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_7911331b7c994e129bb68efb0ac05ef3.pdf?index=true
- http://pikaderobiw.atwebpages.com/tefipufuwuwote.pdf
- https://s3.amazonaws.com/didowugorokirug/have_to_has_to_exercises_worksheets.pdf
- https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_bc4351a0e5824cf4926d690050bf8c80.pdf?index=true
- https://s3.amazonaws.com/bomifabipi/best_vedic_astrology_books_for_beginners.pdf
- https://s3.amazonaws.com/farefasejikap/natwest_bereavement_services_account_closure_instruction_form.pdf
- https://uploads.strikinglycdn.com/files/a5a860ab-dd12-4978-85b9-02ecc9b15d83/98819558495.pdf
- https://uploads.strikinglycdn.com/files/ab114ea9-106b-4b46-9ca9-ce7a524b3fa8/43470897301.pdf
- https://s3.amazonaws.com/fajeloninesitel/75529391114.pdf
- https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_2236a8b9f3f145bbadcb4d90bf5a5281.pdf?index=true
- https://uploads.strikinglycdn.com/files/ff3300b8-6dd0-4989-a9f3-2634af0fcdcd/26097247700.pdf
- https://s3.amazonaws.com/zufaxepixiguxax/kobe_beef_japan_guide.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000108c2.bin` `c735c7c709ec7e0aca2161fba730a663ec6491c40c366d6ba9d3b95761e9ac56`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108C2	5324 bytes

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