Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8af793ab6f38d3…

MALICIOUS

PDF

75.5 KB Created: 2021-07-04 04:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d314b40d2e2bf97b05c4cd1dec5a7303 SHA-1: a4a514c2444e185a228fa0e30f64a180ea99c024 SHA-256: 0d8af793ab6f38d3bb5d3908ad7ebb31aa305e4539f3e2451825c12cd7662a46
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. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links indicates an attempt to direct users to potentially harmful external resources, aligning with phishing or malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/sa26krhmbl5ehdrr81gi6461h7/54862103967.pdf In PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/a69fd0f06ca733381ba5a2b188f1a9ae/31622152636.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/gds0n4tp8g6h17l5lkmi1g1na2/vamawodowiwazerisozafawik.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/vigujipuvorabezoj.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094774fa4b6c---42497752761.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608926c8260ba---45990128580.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7995c92a8b---34950296257.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/pizafagotowofipe.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/60279200907.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/13086077125.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094807cbe6df---3814336870.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/9skm85fb3sutuni42njmi9c6ja/69073443291.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/onf0veoe5mu19uov1nbvvv3htc/11196370937.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/nujanixefanuvovakeguj.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a736bca0c14---dokanamimajuxavunajug.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/71597185825.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/38f51e1f68cf448774eff7cefafd9794/63083340122.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2f8feb69d221648606523780d55d9f86/43224061057.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082c42bafbf1---78093625826.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce30abbe69---21484203872.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6aa2689ad8---45634859885.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/omuvi50tu1830hcap5qdsq1gm0/39831327447.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd5fc5c13---9404316875.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/tugilurafudisuxevut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=my+phone+number+is+blocked+how+do+i+unblock+itPDF 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_off0000c717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC717 11140 bytes
SHA-256: 962f6a5dd13f976f19c789b6e5e27c172790b9c6803da31357e7fb3826519ad4
font_01_sfnt_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 15396 bytes
SHA-256: 9a27897e7ccaf218cd09324f0c527f5901c925d1a1e419fa6cdb4f7786fc85c8
font_02_sfnt_off0001083a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1