Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c20e2ee610fed2…

MALICIOUS

PDF

96.3 KB Created: 2021-09-01 12:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 62a2decd4bedd822245b103113694201 SHA-1: 36c8680ff95a7b4c80028d6e9237dfcf8b02651d SHA-256: b2c20e2ee610fed29284ba2ade4d29ea2319abd2c1a44dd1c1af35017c1149a3
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites. This pattern suggests an attempt to distribute malware or conduct phishing attacks by obscuring the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://dishandspoonproductions.com/ckfinder/userfiles/files/75517460154.pdf In PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/c327a9e9246da480b1d466b5b158798f/33257947658.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/xuzitob.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/xewenabetodavowivakas.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/divurenidogoramexexoziz.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/87eb52f32e568703467ed57f61218b57/kirexejazonovifo.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/razodivegemilu.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/binedukebap.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/03cfe0e46e295d8dccb2c46763b072b1/zutipiwem.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087051796ac9---vizufumozezonumovuvol.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/92dafc8443a7bdec4eb462768831714d/kolelelexemuner.pdfIn PDF document text
    • http://rapet.hu/files/35689475329.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/89f8474d22c28c274d9917877297e5fd/87692707824.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/jegub.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5ab6ccfaf---52188374816.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129608fd4a15---2328097641.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/takakijujipasevi.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/97290459367.pdfIn PDF document text
    • https://midasspa.com/ckfinder/userfiles/files/47215207671.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ca0db2922---fopuzorigowigepefel.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/0ecf7e5a125d34abf5c0bdb12faa43a7/nitixadibajafojeze.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5daa82b63---xunevegejawudagaket.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160967016455d6---74275398906.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6ad01a50d---jarudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=lord+of+the+rings+1+extended+edition+onlinePDF 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_off00010f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001273c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273C 19460 bytes
SHA-256: b9baa7c5a79dbb99041ed5a04665ad8d8bb347c09da227159b23ce86aadbc40a
font_02_sfnt_off000159e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E4 10580 bytes
SHA-256: 49af7a8e4810b886bae0ebe17b562da00d74adbf6194e68ec9936003e006bea2

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