Malicious PDF — malware analysis report

Static analysis result for SHA-256 c419976f524aa4c7…

MALICIOUS

PDF

68.2 KB Created: 2021-02-23 21:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b32120bab0d31effb1bdbafb24a91ad2 SHA-1: 387a05caa093a0152ee19f50e33885749afd291b SHA-256: c419976f524aa4c7ab383a38cb1827f221e355b66810272435a292fccac9fb31
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=free+download+movie+twilight+saga+eclipse+in+hindi PDF link annotation
    • http://datingdate.site/79281344673ma45o.pdfIn PDF document text
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/e870e57f6de2178.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/fspjaia/85266893366.pdfIn PDF document text
    • http://community-day.ru/mario_and_luigi_coloring_images1o739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5fd61a3c325be.pdfIn PDF document text
    • http://agent-ritual495.online/dowasogegakewaruzudopid4l7lw.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/demirivili_girozuxujujedez.pdfIn PDF document text
    • http://you-bestshop.xyz/how_to_view_swann_camera_on_tvuhy1y.pdfIn PDF document text
    • https://zodukoweferu.weebly.com/uploads/1/3/1/0/131069906/5261881.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/5493479.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/gozifep/how_to_make_a_bolster_pillow_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/opera_vpn_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/criminal_justice_reform_jobs_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/big_ideas_math_answer_key_puzzle_time.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/81226358259.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_off0000cdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC9 5596 bytes
SHA-256: ae08a5616387d7b2986acdf89ed59167c5f1c59b9712a32bd3217435ec4b2193
font_01_sfnt_off0000e0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 10184 bytes
SHA-256: c1726800d8d874a0a14a2d8659c94a2f90ed16c0ffd47e3cd6ca6a1d74124862

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