Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef5cbcd4e95b12f…

MALICIOUS

PDF

76.7 KB Created: 2020-11-13 13:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 447607f4123ef26145556c5b22be6dbb SHA-1: 43e04e50f8a3035b0211ea4ff966add9e61f978b SHA-256: bef5cbcd4e95b12f04cdfbd5068dc144934cc38a98abf6164f412c811fac5fe3
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://traffset.ru/123?utm_term=fort+constantine+fallout+3+launch+icbm PDF link annotation
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/busilew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5f9385d9d7905.pdfIn PDF document text
    • https://wapixetisabin.weebly.com/uploads/1/3/4/6/134685373/198219.pdfIn PDF document text
    • https://neburaguvud.weebly.com/uploads/1/3/4/4/134477844/simule.pdfIn PDF document text
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/4003188.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/vexotuse-vurigumodore.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/58aa4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gewisetug/12212750650.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/nafew.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/60828863701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6253c2a-e7f1-44a8-8264-d409218f7f87/wilder_vs_fury_reddit_stream2.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/wafesapivaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9e9ecc-2594-4eac-812e-0345d777e3ba/bemutivezilegidoluvin.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/doa_setelah_yasin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5919fdb6-664f-4c8b-b389-b909cd5fb836/kimupexefigoselerenunikel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 3568 bytes
SHA-256: 0faa4d7abbe5276b5dab44b26ad265519eef8504f20a61f282a14f9ebf8585bd
font_01_sfnt_off0000dda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA1 5260 bytes
SHA-256: 7018c70de6546e03c2c06a11edccbf47b4d884dd4a0cc19289c0ec84a0101ad7
font_02_sfnt_off0000ef52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 12252 bytes
SHA-256: 1aca2cad8c4c464efdcd92c173c3a5026e31c275f63314fb286b5dde000e2839
font_03_sfnt_off00011720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11720 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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