PDF malware analysis — malicious · b1f09b2bfb6f6ec6

MALICIOUS

PDF

69.9 KB Created: 2021-02-26 16:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10

MD5: 5639e42cde4565f539ec734e1653cb95 SHA-1: fb5eb884007bd3c38c7c83b8e379ce9340884b57 SHA-256: b1f09b2bfb6f6ec60104416fe34b8cc5c1e1fbfd455de50d8a6f44eac64aa9e5

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://xajibur.ru/award?keyword=excel+vba+get+rows+in+table PDF link annotation
- https://cdn.sqhk.co/litonesi/zN8edie/jebiga.pdfIn PDF document text
- http://sofidujewa.22web.org/deep_freeze_alternative_for_linux.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4375358/normal_5fdfa8ba25821.pdfIn PDF document text
- https://cdn.sqhk.co/jifonakilux/Dqja6Kn/g-_code_grbl_android.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495059/normal_5febf0163ccad.pdfIn PDF document text
- https://cdn.sqhk.co/dedogupazib/iigicjh/84691350266.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4426279/normal_5ffcbe543027b.pdfIn PDF document text
- https://cdn.sqhk.co/wupetutigo/h9hdyFZ/ranks_in_canadian_military_and_pay.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/xisakazelelinim/superman_wallpaper_images.pdfIn PDF document text
- https://s3.amazonaws.com/vavale/46913991489.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_off0000d76b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD76B	5284 bytes
SHA-256: `9c857d733cb25a9c55e56c3c9c08b3350b1716c65d865e429140851bc19e4e45`
`font_01_sfnt_off0000e990.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE990	9880 bytes
SHA-256: `cfb42e7408e201f0f17e306c48308b88e85e3343a60efadda16694e374101b58`

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