Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f784acaeffc57eb…

MALICIOUS

PDF

69.9 KB Created: 2021-03-09 08:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5847803b080440626ec9757d7a9e3726 SHA-1: 6c18201bfb0c6ac6e636d35bd36692d286e8db78 SHA-256: 4f784acaeffc57eb59145cde40f73ea49a46fe1e1641e47338b57a7a680af9ab
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://crophysi.ru/wix?keyword=minecraft+1.11+4.2+apk+sin+licencia In PDF document text
    • https://tanutalavisa.weebly.com/uploads/1/3/4/0/134000413/repuvosemer-loxinezaso-lokowazirawij.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/wibefulewusejulo.pdfIn PDF document text
    • https://joxuripuziw.weebly.com/uploads/1/3/4/2/134266010/9ab42e.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/kogedigosekazolojupebot.pdfIn PDF document text
    • https://feliwisinawo.weebly.com/uploads/1/3/1/8/131856919/ronakajuzetudadel.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/36ed91fc7.pdfIn PDF document text
    • https://nogusuxewi.weebly.com/uploads/1/3/1/4/131438155/f6ca754d5.pdfIn PDF document text
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/22e15.pdfIn PDF document text
    • https://dopupuwupexiro.weebly.com/uploads/1/3/0/8/130813117/lorivanukomuxu.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/77889704516.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/jivagajamav/kijeronexirenuki.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/27918627632.pdfIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_ca177fec94a04f41bb0c7350385d828f.pdf?index=trueIn PDF document text
    • http://lujawevelixife.epizy.com/what_intermolecular_force_is_kr.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/88009563033.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_311e46dbbf2f45a8920562202ebc3b15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/betterdiscord_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/paluj.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/wunarafamosavipajasira.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_off0000d57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57A 5384 bytes
SHA-256: 919ac34a913e9a67f519afb378c7217360780679c95553d1955dc0e8923123d6
font_01_sfnt_off0000e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 9984 bytes
SHA-256: aa22d080f26944eab2f6f091bc9421111552dbc0ced070497ac694531319556d

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