Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da26f30281296b5…

MALICIOUS

PDF

88.6 KB Created: 2021-07-25 15:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 729474a6b8fbdf48b29a91bd0abed0c3 SHA-1: 6d33912c6279a2e78dae35da0189b9a66ab80941 SHA-256: 1da26f30281296b5f7e673423701dff8d5a044ba19f1744278f30a2f79b90160
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF containing numerous links, many pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of multiple external URIs and a 'download button' heuristic points to a social engineering attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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 http://sumbulefendiegitimvakfi.com/resimler/files/laketilan.pdf In PDF document text
    • http://goldcoil.com/uploadfiles/files/62586613753.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/c7be57a9011dbe009b59776066e47c78/62458131843.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b948d483f93---93163494259.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/rigirorexotanud.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081215c76447---58331383854.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/26519295332.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a42cb41a3---golimu.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/vubimexeretepuvirinuxim.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/fesabokosino.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/2931775129.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/mibaguwipujufidejixi.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/naperodekujogagut.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33bda848ba---lifovop.pdfIn PDF document text
    • http://bakoca.hu/files/file/40999464505.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/69178608481.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd34dc57027---siwos.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/89617953737.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/68150699892.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/55454370947.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/6ef8c1fe7d84c35c6a50a0af55a7e795/wamafimomepo.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/gazaraze.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/lapugi.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/34994967321.pdfIn PDF document text
    • https://hoavily.com/uploads/files/gexozavivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=human+anatomy+and+physiology+lab+manual+11th+edition+free+downloadPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 11428 bytes
SHA-256: 7896895ded2bdffaf98937d76416511ffcad7dd11765475c2838fd12da994b03
font_01_sfnt_off00010ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 17760 bytes
SHA-256: 1f6fd991e4a58f5d293d606f375e023398c8288b745733b5b802c44e3d2990c6
font_02_sfnt_off00013b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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