Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2c07d25c861248…

MALICIOUS

PDF

108.1 KB Created: 2021-09-01 07:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: f9a593bea1877498fe702dc82048cecd SHA-1: 0f6d36f22c817d8f4d19b8a55720ea44f6f926a1 SHA-256: 8e2c07d25c8612481bce1e3cb3e2bed14be594fa10cf7aaa2caa136cc6003b96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://medvor.ru/uplcv?utm_term=scripture+about+taking+communion+unworthily PDF link annotation
    • http://akcjonariusz.com/UserFiles/file/magudiravebudarofo.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24086413423.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/80d640068091131dcc44d238ccba0846/dafibavofana.pdfIn PDF document text
    • http://yuha.be/_files/file/xovupu.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/24a520ebd6b9a3813cc1cacd989c7230/zemubiromavekesov.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/jenorurudola.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/de38f4f16a6869051cff5d27f2bdc4e8/bimumojimopidowubodo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160731fa552812---79304739171.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1545357034---mukipolubid.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/615762a68c60dc571feab083277e3332/1453716370.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c125e5c0840c0b41a29e99bf675e68e8/vukavikezise.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/6769306823.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b787cf541d2---tometajosukegivodak.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/16509019170.pdfIn PDF document text
    • http://abc-tel.ru/data/File/vupikedosewavitidobux.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/tilemokalolan.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/35c7bcbc705e628749365035a7458942/56500757369.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/kelilebulogaf.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1612b9e31584b6---zemamogakixikazovo.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/78939167910.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/n64dpevu9fn5l5kf1kl4kbo890/63830349212.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/voxavu.pdfIn PDF document text
    • https://buka.ru/sadm_files/pukesilogekevogabasudal.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecd6b11ffb8---99055196865.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_off00013542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D54 22224 bytes
SHA-256: 8f89d5b4f2effc8170ebe6f2201b73d94b91cbcd99ecd3942e49a36f520e1eea
font_02_sfnt_off00018705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18705 11260 bytes
SHA-256: bf61fce964199ec033e93f8a7cc7e38548a1581d4fd02a4506819136fd0520d4