Malicious PDF — malware analysis report

Static analysis result for SHA-256 f236fdf609de989b…

MALICIOUS

PDF

74.9 KB Created: 2021-02-18 23:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b762e3962ad6ea3595b6341962fbd7bf SHA-1: 443525f13685d41190b0a80adaa543d3cb6b31f1 SHA-256: f236fdf609de989b59266225bd4181cde18bf22a413dc9360f68e2eb74dbc1a4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/123?utm_term=what+are+the+rules+of+life+board+game PDF link annotation
    • https://cdn.sqhk.co/desogepupema/XZGWibu/mozunomuzizubot.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/ighjfgj/93735583012.pdfIn PDF document text
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/d7a2a437d.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/55c74597db9d.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/dgighnS/siroko_tech_sunglasses_review.pdfIn PDF document text
    • https://ribigitapupag.weebly.com/uploads/1/3/4/8/134887221/d9e47f85460.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/jjwzSVt/61813510185.pdfIn PDF document text
    • https://cdn.sqhk.co/benadujeju/bP9Kjbm/46946860220.pdfIn PDF document text
    • https://fagozozefixus.weebly.com/uploads/1/3/4/8/134846406/kufugokat-xepoxokeketu-nubidur.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/vonuxagupeduze/14449566298.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/16249558264.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/foxodemusakawaxeverofilom.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/tagalog_english_dictionary_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/64580103424.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/web_based_ad_hoc_reporting_tools.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_off0000e554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE554 5476 bytes
SHA-256: 9809e46c05308967c1a400b9231e632762a3678c79eccd197af10bec212ba4fe
font_01_sfnt_off0000f7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D1 11704 bytes
SHA-256: 562ac36e9435d860e2806316e214ebcb1cc27ac1caa40f74f91ece7d20181b16