Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c8011ae9de1632…

MALICIOUS

PDF

69.0 KB Created: 2021-02-16 09:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d2733abd0ef261ba984bf54a638d6665 SHA-1: 720d58b626f8514cb992e1a5649e0d9bb89b9e40 SHA-256: 32c8011ae9de1632ee66907ec470913cf311d1b8b927196937b99caa1ead0e03
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=understanding+pathophysiology+5th+edition+pdf+free+download In PDF document text
    • https://lufuwoxataj.weebly.com/uploads/1/3/1/3/131379696/mijexidagogixa.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/bxif7Zv/dragon_merge_challenge_22.pdfIn PDF document text
    • http://leyloften.online/95830892366tj9j4.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/gchcZhv/zombie_invasion_flash_game.pdfIn PDF document text
    • http://therarbooks.com/astrology_natal_chart_report952uu.pdfIn PDF document text
    • http://contentmedialiteracy.com/9371933939njqee.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/4kljcih/64006289719.pdfIn PDF document text
    • http://icub.tech/69352105297uxy5z.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/sogovekevi/rapewuwexotidexuxutirino.pdfIn PDF document text
    • http://mezotake.epizy.com/changelog_template_html.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/tekadodukopiroko.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/bolanle_by_zlatan.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/laziness_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/61260089262.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_off0000cf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 5612 bytes
SHA-256: 3d92507a95d52215eec725cc87e1195a7249024e2ab8b8e2f024e49e256c4379
font_01_sfnt_off0000e264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 10608 bytes
SHA-256: 0913a0b754f7c7123de1a949a5e9fc0dc0d0c85697d16089b912afaadae3c706

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