Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c5597439adee05…

MALICIOUS

PDF

76.4 KB Created: 2021-09-01 12:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f450a432eb85e044a5057dd41e025587 SHA-1: 94a7fda0df335c9121e48dbfb3c60c0b6fcd973d SHA-256: 02c5597439adee056c07b926c1f57a28e3d737dfea5f5e91bd2af5026df91ada
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, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The document body is unreadable, but the presence of numerous unknown URLs strongly supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://alexlunacoach.com/img/editor/file/sozinebobopotix.pdf In PDF document text
    • http://fittbikese.hu/files/file/78586879716.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/95534414793.pdfIn PDF document text
    • http://derma-dts.de/files/file/17053554403.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f07ef7d64b---53899917439.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/seritiri.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c2782f2fb---fabadavexibelezege.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/lomoje.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/33610007541.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/4348b7235d7e743f647cdee0a9c87203/15148100413.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd679f2336b---43386194394.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/44641553885.pdfIn PDF document text
    • https://csodamalom.hu/files/files/laxirasironevo.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3943d5062664802510a48b3562d4fb27/rovajejonepebaxil.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9855bef02---92995699121.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/pasuwep.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/37530445013.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/sakijinen.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c02cfc2c85a---70411322597.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/33c2c7c8df5d7ded253a9d2185285875/89748047177.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/32368471899.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/45980505073.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/jfqcuvsv8gksbo9hgb567nfemh/roguwikejekozun.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/81083876107.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/4ke4o9m1vkcme3j6rshpcndn95/30860294786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=types+of+computer+graphicsPDF 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_off0000c791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 10956 bytes
SHA-256: 0d3af897df40c4df2fcfd6044be7f6ee8a7bcb60c000f08729bc2f2eab3011c1
font_01_sfnt_off0000e117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE117 16576 bytes
SHA-256: 2c7ecdf306dfed2121b8ea6abf0928c810826c5004e68d7cc2cbec54f5defbc1
font_02_sfnt_off00010b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1