Malicious PDF — malware analysis report

Static analysis result for SHA-256 930f61640f949312…

MALICIOUS

PDF

135.3 KB Created: 2021-09-06 09:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d832d453317984a51ba55ff8ab87936b SHA-1: 0d3c2e30e3ec36481b4f453123d099f23ac2d204 SHA-256: 930f61640f949312264edc5bfc076deb482c142d21e3dbe1a7a9fe6ae263aa09
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9705

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://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/385f48f435bc4178a111e30e2f36a29f/nupuvogodunoxofizilaba.pdf In PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/am0pon5jm1j62e8oggmaq3ac8j/12367335453.pdfIn PDF document text
    • https://jambukuning.com/contents//files/kenopurupa.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/bimanadi.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/27809404849.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/64789258655.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/24700061719.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/90720403021.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/878d260c3b45d01c69e6f605c85905ec/53162173570.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/dofuxadosurirekerol.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/58743860584.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/4o3ltcubom45qrg1eno9t3sda3/83674804381.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/43213521387.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/jokelala.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072bb7f5308b---39250636283.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/mamenorufomasimotofuze.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/53e91f0fede435bd5c62f95dce40d84f/kubuvelili.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/59715375117.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/fb4bf7c23cec38692ab16256c3be6cf2/71944997455.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/77t08sknvgrb91h63su9jr9nk2/jagoziwumapolotajavoni.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/099a1b27f0e4facaa87bed530fc35b0a/87185287768.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/79112294111.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/27721578852.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b276b2fcaa---1669435211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=smartha+sandhyavandanam+kannada+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000178aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000190c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190C1 10720 bytes
SHA-256: a678be340f2d4cade78175b432123b7da86572bca5caf01757d70c55b66cc3bb
font_02_sfnt_off0001a927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A927 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_03_sfnt_off0001b11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B11E 16348 bytes
SHA-256: 8fcced7a8fcbf22d45689b44407ce1c1b45b78050135da208b7eeea4fc129b0d
font_04_sfnt_off0001c78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C78C 27876 bytes
SHA-256: 32e7e13f95a80a3a753db6426b37a420b0ef997400f68b1741ca9136ceed8021

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