Malicious PDF — malware analysis report

Static analysis result for SHA-256 2326001477cc7443…

MALICIOUS

PDF

84.8 KB Created: 2021-07-18 16:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 69fc3e6a9ebe2c86067a560fb505a85f SHA-1: df1ac1c1577cc0fdc85d4e5781c6c139a61b03c5 SHA-256: 2326001477cc7443d9eccc0ac2e7e3e11c97e7cae7ea2c0b8be64d1ed2e01dd7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised WordPress upload directories. The primary purpose appears to be directing users to malicious content or phishing pages through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://nnkcreations.com/userfiles/file/vawarofek.pdf In PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160855320de237---68232544506.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/fafififajejexodibo.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/33821bf3ad531bee659249417dca3a64/93906194176.pdfIn PDF document text
    • https://telorgabus.com/contents//files/lipizuduvodagun.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/8d28f5f9635ab96d4ddb1f811b5f0dab/29728150262.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c742cedb2550cac2e0eaae45924d444e/63929418325.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/ae39b70704988ded8acfb7e2da683a44/tepiwemote.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7f8217166---gowarakigubenetixofoku.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/96469797823.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4d1242b39---93133646267.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1bf9244d3---26352671909.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/10810520056.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/miritawokuzitivu.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/28601935939.pdfIn PDF document text
    • https://esz.jp/img/editor/files/maxeduzemasafejugago.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/waxenorizuje.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088382830da7---vokadulibiwanuxisigu.pdfIn PDF document text
    • https://loctra.net/userfiles/file/12649523196.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3d1087ac4---xosutaratoz.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e042c12b1cc61fc55c81eb54a7d274a/verukitebezugezewevosu.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/88839596266.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/34561112717.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/mapegixobalejekurubotozow.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7e36d7d92---kufukib.pdfIn PDF document text
    • http://aven.su/userfiles/file/32497818148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=positive+words+in+sPDF 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_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 16720 bytes
SHA-256: a8fc27d644175fcf9e108babf46a049037f1ee9be237fd3180c0d1ad97d14553
font_01_sfnt_off00011712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11712 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F29 10184 bytes
SHA-256: 199980febad05db66b64a6137d51a06299d514afb51293efbb969477bda2c3e7

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