Malicious PDF — malware analysis report

Static analysis result for SHA-256 77391b84b3ba9aea…

MALICIOUS

PDF

68.4 KB Created: 2020-11-11 04:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 26689426466fe88be536cd9e3d281356 SHA-1: e1f4eaab275490ce55bca2da67536f4df4d0428e SHA-256: 77391b84b3ba9aea9a38afeecb8146c70485d5fa00885f9ad955cede700b9ceb
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffmen.ru/aws?keyword=create+an+empty+dataframe+scala In PDF document text
    • https://saxejuwujare.weebly.com/uploads/1/3/4/4/134448786/7c389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404964/normal_5f9e0295795ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f870c8062e64.pdfIn PDF document text
    • https://wepomifid.weebly.com/uploads/1/3/4/6/134676114/watufinawaduwijurit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5fa40c9c77932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f9c3009e1d53.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/0035b857-4a10-42f1-ba48-3e20b8a4a95b/pudavazozilozal.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/41344190077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ec1392-673a-4a7f-ba70-2f7b01dc6a76/pugotujegul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf7911e-6f32-4ff7-a268-d2386f99c64e/92161698513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1fa850b-4c29-408c-9067-d17915299780/modified_life_stereo_wiring.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/viketax.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_off0000c9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D2 5308 bytes
SHA-256: 597955734b785405b15a2cbc7cb2b4eb62d3408ede5bef546d11cdfb792b0a59
font_01_sfnt_off0000dbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 12288 bytes
SHA-256: 95e8f9e818ce17e9bbc351c24e8ef86d6268dcef4e275bee13e8c75f9b15987b

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