Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e8b73aff471c25…

MALICIOUS

PDF

79.7 KB Created: 2021-09-15 19:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e730ba77150184a4b56ddc914b9e59c7 SHA-1: 42be6c1c01604c5231f64938fd8f81b3a75cfbe6 SHA-256: 01e8b73aff471c25ccc26829864b4b205b39ecea70c75e235198ca7ae4671523
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains or compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7163

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=chankya+niti+book+pdf+in+gujarati PDF link annotation
    • http://el-master.ru/userfiles/file/sexokamifitotedajer.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/44075620331.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/15422889848.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/50846420840.pdfIn PDF document text
    • https://lapakunited.com/contents/files/pokofosuxovoguda.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/19726617409.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614188d883d12---49711328567.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402b5a86554---waxap.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/c44d9cd39240a207d9bc98f0374abbb6/63285565776.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161391e1adb949---12745226738.pdfIn PDF document text
    • http://www.musicboxpiano.com/contentfiles/tafimuritisak.pdfIn PDF document text
    • http://cobmedia.hu/include/sojipojebu.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/47990812253.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/69670441855.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/63665491634.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/56039402177.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/161348c43e1bbc---lorajitutobamajor.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4741fe9ac40ac9574fda410ea45c4cd7/63998641936.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/vasatipanikavipejole.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/tepizewiv.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/romemasibugamagewip.pdfIn PDF document text
    • https://krossi.ru/images/content/files/kotirizebati.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/39493641760.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC865 11036 bytes
SHA-256: 58285061427659a74e16f74b638e85d49cfab7ed4e9621e5795cd33f78204e6c
font_01_sfnt_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 24312 bytes
SHA-256: 5f2ed1a87cda1e652f607047934f46aa5f024f945b0fcffbe62d91f0b90da4a1
font_02_sfnt_off00011f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13786 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc

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