Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a62f99d836575a…

MALICIOUS

PDF

72.2 KB Created: 2021-09-02 23:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9fe9928a8eadeddef33f18397723c63e SHA-1: fbf1e6856f68b36a015e2e3250e942fd1a265bc6 SHA-256: d0a62f99d836575a79b8214d478a9cd62c225617e68698e46fd4eb4d0eb2e1f7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of numerous links and the use of disposable hosting suggest an attempt to manipulate search engine results or distribute phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ed91ac4c87---razijupovukinabuxe.pdf In PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/4ite2f2605q59b9hd7p0n816h1/juvak.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b53c1e4f196---wuxizesogilamupesaxa.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/7031610671.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/72764468101.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/7b825d88878c11e1035f79e6a37dc581/18497196570.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8a8e8d48a---kutamugejosepawasot.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d16a586b2e---55255069070.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/4825549327.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/77228759646.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/0001e7de0303fdf70597702fc9d76e1a/74585528633.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/poximikuzadibojenomes.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/52999052526.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/nuxitunogiladeduti.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606feae739113---jobetutibazi.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/e9b6f41d3268ec518c84bf8be827ae8f/nulaso.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/s6krtp9tc0dk7vv4tukhtfrjcf/35417430659.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/retebudunevonut.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160802e64c33dd---razogekikekewenun.pdfIn PDF document text
    • https://gdaniec.com/upload/files/30179012326.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e689f17872---bowotivudaxavepe.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/68121424128.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/20677078993.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/17506028860.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/33652530607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=endometritis+journal+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD316 10872 bytes
SHA-256: 134101a5e71ac629f052b48eae9dcd059fe56afc6d5523418c05ae58589fa3d3
font_02_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 15552 bytes
SHA-256: 1eecb2a9333f056562636b4787bd0463ed3eeb5f1ed62fa5abbe545bc75c0608

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