Malicious PDF — malware analysis report

Static analysis result for SHA-256 208cd0718643f22e…

MALICIOUS

PDF

83.8 KB Created: 2021-07-03 12:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 60ca56ae1a16fb4048809f47f0bad993 SHA-1: dbd5d0566c49d4df3097a55c6de961aabab8d6de SHA-256: 208cd0718643f22e5ee94a13d4f7ce9d5311f31f93517a3b2a90efd635d00f6a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics point to the PDF acting as a link farm, directing users to compromised WordPress sites. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to exploit users by leading them to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b756380e8---jimimilakejemadovaweb.pdf In PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/ludepazajesuteratogijabid.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/6ec04bc7370d52ddeb53b8fec712389d/nofasizedusev.pdfIn PDF document text
    • http://dakmet.pl/upload/87946711752.pdfIn PDF document text
    • https://dm288.rs/slicice/file/wokovametepemojali.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/guduxupisefuligurisik.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/e5a90caed33b6a0128042d172e2a24d0/kowufolutedu.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcab91ae28---33815470971.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/c6835c12009055aaf3d46c6f0aa22f6e/sidipaselono.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c841f425b7---44711838400.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/1m1fk1vfei8ifsgf6aq9f8oge2/15374697048.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/potebip.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/vakagovuwukijotas.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/96278a99323706901fdce23f48a82801/33509066972.pdfIn PDF document text
    • https://gilbertems.com/videos/file/66388790146.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/74537098141.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33052e6fa0---73480185443.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/kogidonuzadorivamoj.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcc2ae1d92---mujelimudanudoxif.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/jlkhhqhbutd6f32l7hlckhfhc2/setopipogofufi.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/91025196652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=saas+application+architecturePDF 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_off0000e468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE468 16728 bytes
SHA-256: 5c5fb77bc789e7445afd3883c2302b2378185dd96ae40c2f3c18948fb43c3ed1
font_01_sfnt_off0001102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102D 10648 bytes
SHA-256: 8be6c3804ad8a3c1124094b2fc558feda21656fcf98f9282389c5ec53cf0f809
font_02_sfnt_off00012872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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