Malicious PDF — malware analysis report

Static analysis result for SHA-256 c801b4922fd7ff44…

MALICIOUS

PDF

84.5 KB Created: 2021-09-07 14:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fd1b3838e35b8d1b02befad3c3413345 SHA-1: 99bc1988cbcf35cc9922d9ffb3d0563a89cc5069 SHA-256: c801b4922fd7ff447d5b61b36ee63963fda264aa3ba676ee979b7aa79130f080
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous external URLs, many of which host other PDF files, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://abwcockeysville.com/uploads/files/nasigamabosorotitafekuga.pdf In PDF document text
    • http://verzorgingsindex.nl/images/uploads/nowageninejevufugukadug.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161174014ad5cb---rofizutedogokimim.pdfIn PDF document text
    • http://aqcons.vn/upload/files/18774961138.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/69670476135.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/trtu9beakb82ocrl44hfv73bk4/71725867502.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/7396ad9e575efb92b21d05177f18b83a/33170446015.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/25010353583.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9deba6771---javojamegisupikulibun.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/51650361990.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/23993384373.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078320da2537---gilolir.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e575c0dd91---rokomelekuvinotubu.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/59484783320.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/75045779254.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e6e562e0a6dfc7c78c2ada63c089cd6b/92834567031.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/9f1da5c9932dfc2b59f3a44ffb27b40f/basumovaweninozibu.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/fuvosezil.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea6de6ce8---vururijonawobarerazuvuxiz.pdfIn PDF document text
    • http://vce34.ru/attachments/file/95657018174.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fbf34239c---27814558321.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/cf56bdb70efea85592dcb1f5f5ea62b5/69535405860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=baby+brownie+camera+manualPDF 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_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 17148 bytes
SHA-256: db4bbf72b8856309e37b2f46fe3c2ccc9a174a46d4835d22dff3de19706e78cf
font_01_sfnt_off00011479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11479 10620 bytes
SHA-256: f05f8c4684d41ecd0f64974ce474257aec3d5007cafe86efdff3d4a1fba3c6b0
font_02_sfnt_off00012cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.