Malicious PDF — malware analysis report

Static analysis result for SHA-256 01309d1a3b7f1142…

MALICIOUS

PDF

80.5 KB Created: 2021-07-02 06:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea4d1221031aa7e57f4ed493c1d3be47 SHA-1: 304f6d6686cdcc779503e3a9b4f1f6b6e4b03e95 SHA-256: 01309d1a3b7f11421ede8dec358a6fe7659a22791ee2240c5164022cf9c178b2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The primary function appears to be redirecting users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=road+traffic+act+2014 PDF link annotation
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/1c08bs5l8tuoj78v2lt5s79q35/setanokofosomajasusi.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/4715853293.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/14104891691.pdfIn PDF document text
    • https://bataretak.com/img/files/file/84701237972.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/ba576efd9344943ebf49127527826b24/94179147890.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/64761953651.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836502a7fda---47666768809.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d5a7a1203---pukimegofigewixowelov.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc60df1e392---tixunakowuxufebopu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73f2441565---41445873106.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4a0a7e8e8---sijujotabufidus.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/43d9f48ee03fe6a871867311185bf723/8660697746.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080f50947505---73441941350.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/ccd6afbdf71efeafe599946400333fbd/79679993826.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/bfc4a3e3fd122696948d6de35bcd7ec9/51643934645.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/19689480131.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/90891692858.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3b6f5a279ec50743b0e85909c4b26f4b/vefolujiwinalixukonowute.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ab6896491b8e778797bbf90d523d7761/31401480105.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/59385543951.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/99727920975.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b530cfed---forud.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_off0000d981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD981 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 16744 bytes
SHA-256: 025089bb1c695aa1d954c25064d1ff38835514193dcdbd9625b7939689b7d409
font_02_sfnt_off00011d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 10436 bytes
SHA-256: 2f785930c36b9f7a76f172d6acad898736733ae3c61e20a2e41796aa3ecd5b5a

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