Malicious PDF — malware analysis report

Static analysis result for SHA-256 8683f26ad9f53124…

MALICIOUS

PDF

68.6 KB Created: 2021-03-05 08:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 38a8303c7b3cb34fb8f20e7619ddcfa3 SHA-1: a06627cac4a722dbc23a6047608cece087efa96c SHA-256: 8683f26ad9f5312498b03c6e166c3493bbec7f93f6bd5f146a67c6d69bf6d8ca
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://midufefew.ru/wix?keyword=mth+124+msu+exam+3 PDF link annotation
    • http://bokaxakoz.sportsontheweb.net/29936249459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475738/normal_5fdde8f3b2621.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385231/normal_5ff28e50e574b.pdfIn PDF document text
    • http://atelier-spb.com/vonetanukomumukumatu3v39g.pdfIn PDF document text
    • https://zujuwaxi.weebly.com/uploads/1/3/5/3/135307850/jezexoki-zegadut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_60359ec931155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_600981343e679.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/50278908375.pdfIn PDF document text
    • https://ragesetenavuxom.weebly.com/uploads/1/3/1/6/131606186/1274634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475729/normal_5fcd35ae39eb1.pdfIn PDF document text
    • http://akmurzina.com/xojurubibasurak8qo9i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418574/normal_5fdd7c18b6e5c.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/are_gluten_free_products_really_gluten_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530578/normal_6038df935b769.pdfIn PDF document text
    • http://lidzadva.xyz/18511702241eix9.pdfIn PDF document text
    • https://meribukefola.weebly.com/uploads/1/3/4/3/134314312/3910291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5fced46a2971c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_5fda63d4dc1f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/mizawogilevaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90db6ab7-fc71-4407-8c31-80572d382ad9/jonowibekinumapixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f2bf73-0b85-46e7-b21e-84ad2d312406/amana_top_load_washer_wont_drain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c497b0d-079c-46a7-b6f9-ae152fe23609/best_paintball_guns_under_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e908b785-a50c-4285-a9ac-0e5a7acd921d/43865419964.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_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 5304 bytes
SHA-256: a0e16bb2f8e14561c742f48c4c8dee47c46bdddf3bb1e88fb42e9fb921a2220c
font_01_sfnt_off0000e2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 9984 bytes
SHA-256: 6ae7e4a874196985948173285d40b7decfb0b6d28a6e312883161a677e8f6917

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