Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c865da48211cb6d…

MALICIOUS

PDF

71.6 KB Created: 2021-02-27 08:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d6d9c32e0f07be2f4e1466cfc566e77f SHA-1: eb1ff1342f94dcb124f0228d255aa4b6eea4250c SHA-256: 5c865da48211cb6d1547869281c3495518059a4ccd1cd800de4b0985394529fa
262 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
  • 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.
  • 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
  • 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/123?utm_term=canon+mp240+driver+windows+10 In PDF document text
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/weluguxuw-zijezazadofemet.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/ja0yUih/xajosonopafifapetitusoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_6028fcbff40e4.pdfIn PDF document text
    • https://goxufosoxewuje.weebly.com/uploads/1/3/5/3/135300646/46d92a618e110f.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/Iicwid5/como_hackear_empire_war_age_of_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/jtAheig/galidazaxaxurisezuzafuti.pdfIn PDF document text
    • https://tilifezazam.weebly.com/uploads/1/3/4/7/134763305/zetawevibujaleti.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/vosavif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492536/normal_5fcff70bb1baa.pdfIn PDF document text
    • https://lofativunami.weebly.com/uploads/1/3/4/5/134581692/7c9feb.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/febopa/yandex_taxi__apk.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/slackware_live_dvd.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/vistaprint_business_card_template_illustrator.pdfIn PDF document text
    • http://todakule.rf.gd/87055577543.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/buwabubozivaxuvoruza.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_off0000d7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FA 5544 bytes
SHA-256: 31ab2d329429b8a4615eb2c410b2bf8c07c2f2c7db57780663e60ae39c77b216
font_01_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 12232 bytes
SHA-256: 6b4cfeb7cc4350de07f987d81980994f1c6a6f7cf09c48da13e5e4ca1b3267cd

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