Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5b74b5c340ab81…

MALICIOUS

PDF

82.0 KB Created: 2021-08-25 21:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 93c0e51d960259d09bdf06dba7f03a47 SHA-1: 5c17a2a22ffc889898f87b571ace5ed7ee1f09c7 SHA-256: 6b5b74b5c340ab8146f3a558001b6f7196142701e1e924ea2afac7fcc30042d5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress uploads or disposable domains. The primary function seems to be directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://magooferta.pl/uploads/fck/file/39108410984.pdf In PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9e1fafb93---78727796961.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a04cc52212---7625343804.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/81241402746.pdfIn PDF document text
    • https://isleo.com/i_photos/file/37108625062.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc3d64bb799---gitukaferamufaxe.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/liwixesaviz.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/fozatozopijifesi.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/79712c5c9c11660c11402ca6846b7e2c/89300968386.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/ximetit.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1de6d2c397---29003850372.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2ff2da476---71407787899.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/a0a8356ba0f083b277413c88f5ce7a5f/15516324987.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4f5a0d331c1ef8cb13c0707922e346b3/pulopelovezanapaguw.pdfIn PDF document text
    • http://jp-photo.cz/soubory/files/1721527144.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/towavig.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/79431547405.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb51a371c61ef69885579bfe90e77c40/44218987525.pdfIn PDF document text
    • https://eucolait.eu/userfiles/files/15747903234.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611397180ab28---wamowuserurorikenulala.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd4966df79---42453831361.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/87288254243.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/gukudaf.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/vexeniwa.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7661b11e3---janedewunobezojeje.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/negodogudexavesegoparular.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+say+baby+girl+in+spanishPDF 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_off0000d987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 10728 bytes
SHA-256: 95a72255c33c105aa633a36f02fa42fb18c88a7e682dabffa7bd7f61fc0d93a1
font_01_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 18964 bytes
SHA-256: 34c2c57289b3e14ac08aa1bafb07b672395ecfd899dc760d4391dd079e0dc8fb
font_02_sfnt_off00012282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12282 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.