Malicious PDF — malware analysis report

Static analysis result for SHA-256 bede8d3440b9464a…

MALICIOUS

PDF

69.9 KB Created: 2021-04-25 18:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cf057f0d4c7753fad9b8a253edd3c198 SHA-1: 11a7d68c4fc3e3427d22bfcb12e5dbbf52c40d2e SHA-256: bede8d3440b9464ae028f221445fcae9d4a46ef2c367a238cb98c0821c5da9d8
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically points to a phishing lure related to free downloads, using a redirector URL. The embedded URL and the ML detection strongly suggest this PDF is designed to trick users into visiting a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=hewlett+packard+photosmart+5520 PDF link annotation
    • https://cdn.sqhk.co/mibemofega/4iaZjgo/35783277093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_6015e17a556e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420760/normal_5ffc91572b8ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_6023d702b6e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_602b953567a20.pdfIn PDF document text
    • https://cdn.sqhk.co/turovonunido/B9idhaL/amazon_seller_account_login_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_601ddfe84b25d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b021a6fc-45bd-429e-a97c-41389f4b7c6b/que_es_un_lider_laico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0cc80a0-aadd-409d-9bbc-5f95d3c019da/60372049702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c369a98-8e2e-4d2d-91e3-3f7e28791f0b/87512011640.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/sindhu_bhairavi_hd_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78386b7-b615-40a8-9188-d1e95775590e/how_to_scan_slides_epson_v370.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/mcdonalds_nutrition_sheet_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/48598921163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/740a7316-a6aa-4eb6-95c1-b4b334ec2ff6/wuxameladopikozupegupeg.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/dabesavebowapuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc428c4-d8d2-4231-b687-9c4fa24fcc07/9354643468.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.

FilenameKindSourceSize
font_00_sfnt_off0000cf0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0A 5828 bytes
SHA-256: 80d78146cb0e1cb5e843d5d5b63236464ea2741262d2975cea7513e6d6f3b643
font_01_sfnt_off0000e2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 12044 bytes
SHA-256: a26fb09a33925ebabb58eb5c540bad1ef3242c9ea8c8977716a7286f09390c52

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