Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe04b952381beed7…

MALICIOUS

PDF

71.7 KB Created: 2021-02-23 15:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b99be5d2782ad137d12acc9d8e0855c1 SHA-1: 7fe0836c2d8008b4fa8cf2e16659694d3221f8bb SHA-256: fe04b952381beed7f283583d6e2ec38ad30babd9983d834390fa46ee4458b941
156 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
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/wb?keyword=how%20to%20use%20colored%20pencils%20layering%20blending%20&%20more PDF link annotation
    • http://com-signto5.xyz/gameboy_emulator_android_pokemon9f86z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_6029eb5ed8106.pdfIn PDF document text
    • http://pefujogori.iblogger.org/website_template_html_css_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418762/normal_5ff7d1d7b106b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_60312093c7110.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446914/normal_5fee7daecb75f.pdfIn PDF document text
    • http://vebafaguxaw.22web.org/xijabopuwisaneboxugenaj.pdfIn PDF document text
    • http://zavudonalu.66ghz.com/constant_velocity_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478926/normal_5fcd694443906.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/zuguvoxoki/conjugating_french_verbs_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/zefonomawenibasalubaja.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/sesitegawabaluvu.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/jitajuzujikanewemubi.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/now_is_the_winter_of_our_discontent_speech_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/64038616308.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_off0000dc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC29 5536 bytes
SHA-256: f1d4cd31bc5eab3654e1b82f3a63c150388678dbd90569a8e829086c9d5e77cd
font_01_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 10156 bytes
SHA-256: 36a31d76e72ff12c09717bb6d9f4dad974a16c30d03fdb399be16c04a68f044a