Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbe1d771edacf38…

MALICIOUS

PDF

67.0 KB Created: 2021-03-01 08:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 550e71eabe151c49c32740ea899790f0 SHA-1: 7da3edefe2b1b6f557ed0d7d54309dcbad999592 SHA-256: afbe1d771edacf3822083ecad3327f4e8e8233470c6314061b5756666ee7dbf2
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/award?keyword=grammar+gerund+and+infinitive+exercises+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386824/normal_6014b6da4d2a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_6034679c4ffcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5ffb045fc9a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_603043b728dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_5fd727c341aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_603c25a5bcbd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5fd835447d1de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5fc690c97e610.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/jexijer/food_franchise_business_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/brown_butcher_paper_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/75136946819.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/muwimatode.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/35096242204.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/good_answers_to_behavioural_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/sexeminevevof.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/89862422662.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/87359023256.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/56758367610.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/betta_fish_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/jeseguwudojojeseta.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/kupevub.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_off0000c84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84C 5600 bytes
SHA-256: e898fcbc6112e36f06fd60f2553d9d19888bfd580aecfc618c086b54c7b00d08
font_01_sfnt_off0000db53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB53 10172 bytes
SHA-256: 97982ff28cd517c1bd4d6f0755e54dc97c9649d7ac0f66a601fb85b6c3d9ad99

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