Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a376ae6d2d4996…

MALICIOUS

PDF

93.1 KB Created: 2021-08-16 06:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 794c4c1ec6e5ffd9118f74aa0fb82f41 SHA-1: e2d76c54a60eb92b254c54b7f2e5d0fa023b7cc4 SHA-256: f2a376ae6d2d4996e4773c5fb029d7eb77a4c20ecf436ca3f89bc91c1fa38082
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites. This suggests the primary goal is to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/imkiiefi2apmc322eu2tjujp7i/87757414110.pdf In PDF document text
    • http://adabaskimerkezi.com/upload/file/zivat.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/zotomatewodozafawefigoz.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1feaab2a30---wizipur.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210803_4D6242D8E496DF93.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/74045423288.pdfIn PDF document text
    • http://hkacca.com/userfiles/zesijixoxuwepofininog.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/42892459375.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/bidalowatujomisopu.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe0b177d06---pexodujavopumasejenu.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/sapajode.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///16086189933.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/tizoxunigomijokilogi.pdfIn PDF document text
    • http://anm-av.de/uploads/files/kofotoxusenadimepijisese.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fc0dd4b59930df9890600139ba8bab77/53536836472.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/rajidelejor.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/1ht9js82cj9mkijhcgtj1qd7r4/24396763926.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/84333754986.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/41619062909.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/latipowago.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6cd757dc0---94923850686.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/lamaketiwoduzeb.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ca2177525a00fdf86822b70db0914cd3/64017233515.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/064fa16a3be77603931f472c364d9c07/34435781225.pdfIn PDF document text
    • http://signauction.net/userfiles/file/tuxotiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=what+is+the+osha+standard+for+hazard+communicationPDF link annotation
    • 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_off00010808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10808 10848 bytes
SHA-256: 26fd769c2c52ecf706a7900756558ed217c25529c3a44f969623be78a30e5925
font_01_sfnt_off000120fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FE 16960 bytes
SHA-256: 2d1d0daf87f24ed536ca1817cfc92bc3ab8ed05c46941b022a8dad8c89a655b1
font_02_sfnt_off00014cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1