Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9da7132f6a3d6f6…

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 22:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b316735973012053e5cd6a89cd94ca43 SHA-1: 1b3191af9cd6686570d7056d83843d28bd2bfb50 SHA-256: e9da7132f6a3d6f647585b19201c3c11fb4eb89d2cc6bcca8de03dd0de92f41e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=indian+movie+chal+mera+photo PDF link annotation
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/81360239757.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/34230545627.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/jerujiniked.pdfIn PDF document text
    • https://lorrainezammit.com/files/file/34742066765.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109041722511870.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613645d8d9639---82837701038.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/2767761162.pdfIn PDF document text
    • https://citronel.com/userfiles/files/xanezilixavunapi.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/xikenegepapavozoreganux.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/93083118598.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/81788135601.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/37684048803.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/15dc381313d2a2141c591f778f6a65af/puvavuvotavopesimu.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/29afbfef1b3e2356eba328d72dfb015a/98157203203.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/64376870914.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/82910772657.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/65970614169.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/50958665099.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/tofewilagan.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/otevnbjjntsd6t1btm8qdu4fjj/16530608567.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/gefozo.pdfIn PDF document text
    • http://ha-sine.com/d/files/48638082665.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16140afaa3e1c3---7447317395.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/2033633767.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_off0000afa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA7 14972 bytes
SHA-256: 10bfff4272dc411f3e0f31e1664c162b4e42e2e5df6b884502449ebc5ea2bcfd
font_01_sfnt_off0000d57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57D 10628 bytes
SHA-256: cd463c22b35dea6e35fb1d25549fab6c7f02e8e4af1490663fade90f8e5a6aba
font_02_sfnt_off0000ed87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1