Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c6c5ecaef54d3a…

MALICIOUS

PDF

92.5 KB Created: 2021-09-16 19:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8adbf51dc92d579da858f66b1cf703d7 SHA-1: 7e49b01c1ba4b64026f48181637e658c2525c33c SHA-256: 49c6c5ecaef54d3ab6b42c031572206ac5993a34854bc684a0cd147a044846d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://wastran.ru/uplcv?utm_term=indian+idol+2015+winner PDF link annotation
    • https://mollis.rs/files/60245237495.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/11216893984.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/gatuvedim.pdfIn PDF document text
    • http://retrofotr.cz/files/file/42227261162.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/grd0pdpl2cmauhpfs019v1ppnh/79298293248.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/0ee7a21420bc7d6bd5624b746efb3a07/83138611581.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/lavewuwumuvosuxozakugu.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/xigobulifujitikabopurubi.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/92692135877.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/17664858341.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/fabupama.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/35949248639.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/35669192133.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021091603245740.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/21008482873.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d4414e333---49162970786.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/barotogeke.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/21327608262.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/wosikos.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614061b47b218---lozuzofe.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/sarifapatamebimuf.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/15067278000.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/mipalevufag.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16141121229cd2---gawenuruforot.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/93590394006.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 19076 bytes
SHA-256: 388378f7a1ab1289d19100a0d5284488a8a98a2a54ef0f3f7808f01838b31a32
font_01_sfnt_off00013438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C4F 10440 bytes
SHA-256: 34b6be18414d64c25332675c73dcf9e01c57bb66f784843a7bc55972e5cac8ae

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