Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff38ff2bbd08d32d…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 05:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3c45efdc937848a8048c06c384c4d753 SHA-1: 10522f7e2badf3d0ad3506719660420867f87183 SHA-256: ff38ff2bbd08d32df48c202fc714f6ee3ad94e28b37805b0d34fbf86e36a0a33
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://seumenha.ru/wix?keyword=never+back+down+full+movie+free+download+in+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459163/normal_5fe8d8de732e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5ffdb2104cbbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5fe25b90a70e1.pdfIn PDF document text
    • https://tamidotojo.weebly.com/uploads/1/3/1/8/131858916/7608943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5ffbdd56df4f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458633/normal_5fce701a72c00.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/zolalujeti0hxgt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5ff57ae1bfa95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_6029f6092e45c.pdfIn PDF document text
    • https://cdn.sqhk.co/dukapudubi/ijd3mih/16818365882.pdfIn PDF document text
    • https://venolebibu.weebly.com/uploads/1/3/5/3/135348563/63888.pdfIn PDF document text
    • https://vemakovuzabomon.weebly.com/uploads/1/3/4/8/134881214/mugikonawosixi-likosisapigefid-ronunoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454544/normal_600a203d27d2d.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/beginning_java_with_netbeansn41my.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_5fdd45831edda.pdfIn PDF document text
    • https://dovejopizodumu.weebly.com/uploads/1/3/4/8/134883147/muxobinela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 5760 bytes
SHA-256: 68792f4d383c770d52cc45864aa48b6b89b408726d6c2a5c07644d969de7dd0f
font_01_sfnt_off0000f39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39F 10184 bytes
SHA-256: c6f4a4caf90d4bfc9326ce6b42c7adf23ae83849285539a6cfdb9be5c37901f2

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