Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ed13e79746c31d…

MALICIOUS

PDF

79.7 KB Created: 2021-07-14 09:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 5115cee0f4ca0ff9ab2f755abc404ce4 SHA-1: 36189fb1e3a729417e77ba1fa152c3c973912b80 SHA-256: 65ed13e79746c31d82b7bccdedc8f53eb3a3580cf7e2f6f3ad193448c85f04b4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as 'https://oniceh.ru/uplcv?utm_term=fnaf+toy+chica', likely serve as lures to download further malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://oniceh.ru/uplcv?utm_term=fnaf+toy+chica PDF link annotation
    • http://kantoromega.pl/userfiles/file/figozotaxofazopubo.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16245655475354.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/8gsb6d0ebefvgi88f8hsn2igi3/zeboviwadaxavudobularup.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/beponagepolef.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/63248752936.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kitagunimigaxurifumesod.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/tadumexusap.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afc5fc6c496---kemirinakefewusefudiv.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/rafonomepazo.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/94803710a85f9b72cae1b1301713306c/31831569787.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/24996357292.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/mtautukfhbsfu3qdc1m66io8e1/roraguwapunu.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/logipo.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/60989170351.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/dozikuronamiz.pdfIn PDF document text
    • http://dzbnf.com/upload/file///36527953328.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b45153bbc9f---50503481581.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210523022514.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/10048581328.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/632106cddaa48c09293ea577dbd2848f/digosemivuxaxavu.pdfIn PDF document text
    • https://petkasem2hospital.com/images/upload/userfiles/files/19546818211.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/sipukokufavo.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/24510535295.pdfIn PDF document text
    • 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_off0000d535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD535 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 10080 bytes
SHA-256: 2e867aec8d8997ed7cf248e4df4429fddc66768307645c68cd43975e53bb2128
font_02_sfnt_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 18148 bytes
SHA-256: 4141a90a87ede8fb1e45d3d212a0f08563b165b05f2e418036d2b21532944564