Malicious PDF — malware analysis report

Static analysis result for SHA-256 7176b3333390bbb2…

MALICIOUS

PDF

80.9 KB Created: 2021-09-06 23:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 917140d12b98c0e315817c4fd300c264 SHA-1: 7507d4db8f2323d96e4d1e86a35b93a4354437c8 SHA-256: 7176b3333390bbb2943051de5ac309574f54e0838218ac9a278cf797f0b78e6f
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, potentially leading users to download further malicious content, and contains embedded JavaScript. The document body's language, combined with the heuristics, points to a phishing lure related to invoices or payments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://marblobathware.ph/app/webroot/img/files/95672595124.pdf In PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074ca722cfca---jivoresinaleguzolujevi.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/34590703810.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/17218811371.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160883ac536c30---tudiguvenijomabed.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/82373908053.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/74286980847.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/gaberivodusotupafovageve.pdfIn PDF document text
    • https://bojovicsirogojno.com//files/34223354485.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/xewirudena.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7c9d3c56---fosulufelusew.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/sixipukotuxamuxe.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b480f42eec8067e3b62b2e3eab83f8ee/mumabijodu.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e72935429376bace4a4d2c86b24d51d5/70441488070.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/vetesatexezikejis.pdfIn PDF document text
    • http://amandamaitland.com/images/file/50909872128.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/2632438831.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/10961027919.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/80951839893.pdfIn PDF document text
    • http://nathulaldasptti.com/ckeditor/ckfinder/userfiles/files/gatojopavafugavodedi.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/xijizawu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/nlb2l49as4cljktvo7ooeibl3k/87583170063.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=faber+chimney+price+list+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_off0000d7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BE 17372 bytes
SHA-256: 7cf3ef039691022ce305f966891d00855d30abf6a0cbb86f8afdf5141ca3e49c
font_01_sfnt_off00010496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10496 10996 bytes
SHA-256: 5eacd87373b6695d69735797feeaadba3b18ac5f1904ade55c5c1f4ef4f2f9d9
font_02_sfnt_off00011db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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