Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f58f59884ef618…

MALICIOUS

PDF

84.2 KB Created: 2021-07-05 06:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 85c021f022a7faaf5de80cdecf646ebc SHA-1: 32e6236ad026792cfb11feac68c9d7d460459197 SHA-256: 02f58f59884ef618aa073f77f0fa664d29ce257ecae14ba8b6aaa60eb7812d05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate that the PDF contains numerous external URIs and links pointing to compromised WordPress upload directories. These links are likely intended to redirect users to malicious sites for phishing or further exploitation.

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://allytemp.ru/uplcv?utm_term=i+cannot+remember+my+mother+by+rabindranath+tagore PDF link annotation
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608133fe5e872---vojuzokexowis.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/7gt3qk3m957rof99if453jaoa7/leleruzorurewanekok.pdfIn PDF document text
    • https://netpage.info/userfiles/file/xujodenukumetimakusoja.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/b3a76dcfc61d830e5103b08be6e0244a/35224806092.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/pitifexinugu.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72772becd2---fexisenuvikutiji.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/jometirozerimigegiku.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/83904290694.pdfIn PDF document text
    • http://industrialdevices.in/uploads/36277308281.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/degedagulisativikoz.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa9ab1a229---14453260234.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/niwipukenekigedesikuzuf.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fo7646ar0et4p911ris9vum1e2/zalajewiwev.pdfIn PDF document text
    • http://wohingltd.com/userfiles/nasabemuvakugenalo.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7cd7dde7---barugudunosokefudixoluja.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cadd9b8528---47346809612.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/62124991602.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1oo7q90q2hs7nmg7uuamqpftp1/4953861706.pdfIn PDF document text
    • https://aokman-drive.com/d/files/xezovixoditovetorenav.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/t00sdu9irhm2r7uqa5akhtjv0q/26969311902.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607a482bf2ef3---zolegasuxivu.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/70fpgoifmus2pb7r7255hovf80/87608360143.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/kunavisam.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/59aec2e3b1008599a9aeee82bbe341fd/pimuvibodaxekajikomumuti.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_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF9 10808 bytes
SHA-256: 5b12d8d10e4259d70302ba565cf14821f4d19713279d0404baf5caad835a4814
font_02_sfnt_off00011681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11681 17044 bytes
SHA-256: 1be150bc203efcafaae2946429686c137d0efdf247dc7dfd3c3232a130bcea4c

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