Malicious PDF — malware analysis report

Static analysis result for SHA-256 015a35698cceff3b…

MALICIOUS

PDF

87.5 KB Created: 2021-06-25 15:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 602c8039931bba495e659b4a2fd381b1 SHA-1: 36a3b320fb1195eba4c5287a020a63107bb88a75 SHA-256: 015a35698cceff3bccdcef68be060f41a8719209229d9b0da557abe470870a28
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The document body was unreadable, but the presence of numerous URLs and the heuristic findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://drsaman.com/files/76456096206.pdf In PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfba9f7b950---41762142645.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94e0ac19bc---segafotawareviluwidiredos.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/30303267567.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080035c851dc---jafakexonunefaxilinunag.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021060400322451.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608115e46ad5e---dapijuvaxepebov.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/zejibumeva.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/levanelipizapopeximolav.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/59094961503.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/25beaaee0e60ad71cba289d32a0a97cf/mawidiluvuvebipebo.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/midudifolomejodobotapuxi.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/9s8vrcivghhhkqlbjjv4aomq87/84889193124.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/51868591635.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/7gkd2sfo4f0kah83nrv0t8mt34/30840594784.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4327c663f---finarosa.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/mabupijurokigalolovujud.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ab92d0514dc0541b5c603bca5e7d4895/dovibuzuluruwizul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=paper+brain+teasersPDF 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_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 17372 bytes
SHA-256: d0115833fe62f56635df682aff548191de1863868937684cc505e910bb88ad58
font_01_sfnt_off00012277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12277 10220 bytes
SHA-256: 92b3ed5f146fcf9f8823bc4f06ef4654a8c0e7db9cd56e1da3a79891722db455
font_02_sfnt_off0001394a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1