Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62d4600e7c4efbf…

MALICIOUS

PDF

1000.3 KB Created: 2021-06-14 02:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 85a0c67b393741047b2ae994268ebcef SHA-1: cdbc1554fcaf30960bf093d8082a833ada990f8b SHA-256: a62d4600e7c4efbf6b39ef6ab791933f95d0ac47639a47ca3a69f20c5a727ac5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a link farm and an SEO redirector disguised as a download for a game mod, indicating a phishing or malware distribution lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs suggest exploitation for client execution, likely via a malicious link.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4513

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
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=marvel+future+fight+mod+apk+putra+adam PDF link annotation
    • http://anhbanglaw.com/userfiles/file/kunamurus.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160794a98de981---51966410209.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e6c2ef1f0---fitototujapifegibatakereg.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/887fac87e2154f4681e3b5e990313f36/pomelud.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/766b071400046a8881c0f4a44908a950/95523403246.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/85767961827.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a55402c38df---37941752785.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-18/20210518044839289619.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/a1g3mvcoapb4vefpg872lrvs5q/3927738077.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f475f8465f5b412276cd07355a7d26d4/jewexasiba.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607053c6d891b---dijexededapubuvijujuf.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9cabae2a370d8ad156515953816761b7/47997804070.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/875b3a2244c6776e0d9af29e3f34989e/66156708276.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/20490149683.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607962faf3420---92029279871.pdfIn PDF document text
    • https://maility.pl_adresuserfiles/file/60943050202.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000f2f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F30 8496 bytes
SHA-256: fe0ee784a5b6807e027e2aa35566307cb4e2028a088cc83a0469eef225faa5a5
font_01_sfnt_off000f4af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF5 5404 bytes
SHA-256: 55d914cca387cc75f9d154a3e5414514784be8b5311cdfb885328a9f1c305455
font_02_sfnt_off000f5d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D4D 18528 bytes
SHA-256: 17fd445f7437cf059efa0e03648dc0e8b9804ff2eb43a494be942508a1c7990e