Malicious PDF — malware analysis report

Static analysis result for SHA-256 021ff8aaa805c0ef…

MALICIOUS

PDF

72.5 KB Created: 2020-12-27 22:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: e6e73524f92433e59046e7a7a9c81a7a SHA-1: 37bd8b112b3a72e2fc936ce14893e01630f8df85 SHA-256: 021ff8aaa805c0efc381e9a130616f70395b0a1dcbfa108f6e0880e0fedb2296
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafficel.ru/wb?keyword=wedding%20cake%20decorating%20techniques PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fc98f2dddb83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_5fd1e7d09d0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_5fb748a171a77.pdfIn PDF document text
    • https://cdn.sqhk.co/sezivalaw/ShcibMv/rovofuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496586/normal_5fd13340df2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5faa16feb5fb1.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/buxafuv-nemibimo-pagavov-jabokakek.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/buponuwebi/cooktop_brastemp_4_bocas_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/autocad_export_transparency.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/drenagem_linfatica_manual_fisioterapia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0e002d-d7fa-4541-864f-e273bc72aea1/89680740229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b79098c-3d67-481b-a309-99c9e512d86d/81999870356.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/78422601561.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/13693943447.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/shark_navigator_nv46_user_manual.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_off0000db18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB18 5372 bytes
SHA-256: b80702fe9e5caeff9ac38190256270ca4d3ef77f9207430ad3a4e37ba8c9c7a2
font_01_sfnt_off0000ed65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED65 11760 bytes
SHA-256: 675bff108ddbcefea321ee6492186258fdc47444509e6ec6c2715b4121387bc8

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