Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b3ea39517ccd4a…

MALICIOUS

PDF

118.3 KB Created: 2021-04-06 11:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 059c39896655e8a9f9aa93b06830b319 SHA-1: d808e2d57909628868c5089ef7544ec7b6576c5d SHA-256: 93b3ea39517ccd4aa6b1271dd491b98ce8534cd07c19408a7e287d1d82de06eb
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 flagged by multiple heuristics as malicious, including a high-severity rule indicating it's an image lure linking to an SEO redirector for phishing. The embedded URL, https://xajibur.ru/award?keyword=formal+approaches+to+management+development+in+organisations+pdf, is likely part of this phishing lure. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/award?keyword=formal+approaches+to+management+development+in+organisations+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450878/normal_6020c0beaf60c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_601afee9272c1.pdfIn PDF document text
    • http://topvideo.design/643099767909avaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_605a112241cd0.pdfIn PDF document text
    • https://cdn.sqhk.co/fedukifenufu/hagcPje/canon_printer_mx922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_6036571bdaf85.pdfIn PDF document text
    • http://dhl-order.info/68187079253e25ge.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/kjehaia/89596936656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_6026ed3099a45.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_5fd68c504d81b.pdfIn PDF document text
    • http://adyga.site/vr_wing_chun_trainerqh82j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_604ccc473cc1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_602bf11c85f3f.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/ajgtgfm/25836568467.pdfIn PDF document text
    • http://consequences.space/patriotic_pakistan_meaning_in_urdu0rqt7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426072/normal_6069c6b22d120.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/gejjkhO/54665273588.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/8ogitNY/skylanders_giants_portal_compatibility.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/jukoxisojow/kimemoposos.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/mijuwikodumelupifiz.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_off0001915c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1915C 5584 bytes
SHA-256: b496aeb60612bf6f81e1f97228237373b8124f1cfc07511b953526d4cd2ebb8d
font_01_sfnt_off0001a42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A42F 11324 bytes
SHA-256: 024579548f0b4fd4d84c94db83f6e030f74febf7608ee5141e4b68d0606ee85c

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