Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b160bc70065091d…

MALICIOUS

PDF

81.1 KB Created: 2021-09-02 20:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: baaff7d007debba25acf5fbdd27450b3 SHA-1: 585767110841b0554ad40ef4986de03a6639968c SHA-256: 2b160bc70065091d8c28e5eb1a861faa6beac0b1b9895050657216e7b89e9960
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://wastran.ru/uplcv?utm_term=crime+statistics+in+south+africa+pdf PDF link annotation
    • https://highendteen.com/userfiles/files/molizixuzigi.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/komogigosesiwufosuzip.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ipp8b39kbiaica35vm46rc5tit/faxutofiwovuw.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-6-5/20210605221955705953.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/4010bc3c6e878f3884d5cc4784a624fd/36095962695.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/sjv9vhbps7qp8598bk620fm51p/36873021356.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/169610801.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8540f24cd9---doribesufiliril.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/52645302138.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/11877964815.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24904770400.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/mesolikab.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/27858612205.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/r88o44kv1cu77f1odg1b3rcisi/51153100152.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e546781025---dukinovawajomu.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/14e28f1ef2c8db27f1d1121aaf266523/vadikipibaweseli.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fa79ccf313e---31676357530.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f59dbfbfa---78938698301.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a53d12dda---lepifuvafugirofigikumoru.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aced9b712e---kimimufopowugesetiz.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/27214274953.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/bukupirasuxezikuw.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b11da5f0961---tanigifulirezovimuzumove.pdfIn PDF document text
    • https://kimansion.com/uploads/file/kukoko.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_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 10972 bytes
SHA-256: 613a98de1c80707367e46e69d8bb44538eec09f736ea591e0d155c96f999e3e7
font_01_sfnt_off0000f15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 17456 bytes
SHA-256: 9047ea3ed3307c67b4dabd1c003981bd100c29d1c95c089eb55c5efbb3ff611b

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