Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bbb4f6df41ec85…

MALICIOUS

PDF

130.8 KB Created: 2021-06-09 18:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c43a337a90ef003b63ed26cd4d3d8a72 SHA-1: 5f45b3e67927d016f9b641744d5ae2fe5a978ffb SHA-256: 94bbb4f6df41ec8559e2f0325b38dba1597544d9c1849bb25516b227c0ec2ab0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a 'utm_term' parameter in one URL indicates a potential phishing or SEO-based lure, aiming to trick users into downloading malware disguised as a torrent file. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=elite+season+1+torrent+magnet PDF link annotation
    • https://poolpoint.be/uploads/file/58716611155.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/resamotepujutiwigilu.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/3ookc6cn89hacesd4nb08qffhn/wipamujomodujubixufed.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/xutediweruduxul.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/33a269a855ba950ee5801732d0c6c587/81715637735.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/ogo1g7f9in8vs4aitc03l2g11h/tipejofutoxisub.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/8445654492769bb0c4199a73ed7b2cda/bilagapixuwenapil.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/c67e188d4a4f22311a8b803bb580f9e8/18256610403.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/52f18ca9e506787d5881e90d316ff285/sibeluful.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aab9fb89cc8---7530240573.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c0a00e087---sirubav.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76c52ddf0b---danuvusosijexawefi.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/2ad2ad8ca981d1b537c94a3085536ac2/fepavegagewobotev.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5dda58c0c---93251781192.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000176c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176C7 6476 bytes
SHA-256: 6b33ff188d28154d6dbdbf812d80b7b44c2f9bc5adfe8bd5e5c9793c1c79fec7
font_01_sfnt_off0001869e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1869E 3628 bytes
SHA-256: ce9eefc3bd1904838e2942a3a074bedf06625a451f40540dc4c7a40e8c283c2a
font_02_sfnt_off000193b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193B5 5012 bytes
SHA-256: 2d662530ff865884224f9f5df74497de6a1139f5328634b549dab612f21e8faa
font_03_sfnt_off0001a4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4AF 15528 bytes
SHA-256: 149854991037d21b8071be23ebcc4eda54f4ddfbfe189c1878847ebc5ec07e5b
font_04_sfnt_off0001d6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6FD 17068 bytes
SHA-256: 93f6c9d72776dd7632de29cd11b8fb5b066887cf726dffb438351c5ab3f54291
font_05_sfnt_off0001f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F009 2752 bytes
SHA-256: e91e5ed774118e394b1b2e1127f4f46eaa9a0832840f1fce1a875413dfa5fc03

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