Malicious PDF — malware analysis report

Static analysis result for SHA-256 e580194a285e61c7…

MALICIOUS

PDF

76.6 KB Created: 2021-06-26 06:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d2e0dfcbd626a67e14ab951140bfdc87 SHA-1: 49ce93caa79ca9c77581c79b878d26f77356ec1f SHA-256: e580194a285e61c750720f728b71a54b562f07a7ca45d0fea2d065681b9ddd45
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to other PDF files hosted on compromised WordPress sites. The presence of numerous external URIs and link farm indicators suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/61d0af2eedcbf18ff551b4e5de2d79c0/ravasudawogivutapi.pdf In PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/zujadesolelelovasevamefep.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/9erdbef4vsk4rlku3t8uqh8l8s/dimoguti.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///vuduzusedum.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/12e3d55826a7cf4f1cb8311a12a734fc/voginosozuju.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/72193718203.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18699717a---xowajemutad.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a53a9be6165---29510464646.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/2204129590.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/825865be5788db442b5b6f15e110b2bf/9407903521.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9787432a9---77425994143.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/68077968856.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/bexapunoviboxagefipare.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/6d4195af70e3e97e146c8e0268619d98/45288118359.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/b2gcpq3b8uag52kdc11ekiqcsh/37834811999.pdfIn PDF document text
    • http://ca1970.com/clients/10044/File/zebupila.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/vepesirajodelura.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/besuz.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/059172dbb84e134788286a876690c693/gilopoki.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609de7ee71094---94882197215.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/acb1fd2f6bd53229b3992da6dc6916b2/wigidutezoti.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/jeragafowipagipe.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/75c4f01ecc509a375cfd88f70587cf53/nevuliposikisak.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/velepokeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=synthesis+of+esters+lab+report+answersPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/939f0403575f10bce9b2701a86d99dc7/vawesanajizisotowewij.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_off0000c9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D0 16252 bytes
SHA-256: ff32f78ae8d0f5e07628e210fb3618e9702babf2a463eef9a150aa951cf700d2
font_01_sfnt_off0000f405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF405 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1C 10872 bytes
SHA-256: 1ee2b9d1f4fbc0004c898f43fcb5f0994de7cfbfeb7ea9fca4feace4244bf3ff