Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eca10e705cd5eac…

MALICIOUS

PDF

77.2 KB Created: 2021-09-08 02:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00f593b1ed806bbf8995267e3f7dd7ba SHA-1: 57e93f54570eda38e4db18820140269572212d94 SHA-256: 5eca10e705cd5eacf549564e4a35665a39cf6070a8a1352bf7a59662fb3335f4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.oteliapelsin.ru/ckfinder/userfiles/files/duruzakabofow.pdf In PDF document text
    • http://richardsonfamilyreunion.net/clients/7/79/79e100fddb184f5a3447a495e7c481fb/File/78211837853.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/gefufojodozena.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/ef846ec9d689e038aace400994a9a000/34011458453.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/8bc3c728e4d12096768ab160dddb9a40/18451246164.pdfIn PDF document text
    • http://gloria-eurex.com/75124423521.pdfIn PDF document text
    • http://haphadoor.com/upload/files/boraxodewaseminifuzawaso.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/40131725905.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a861f0639---10506821392.pdfIn PDF document text
    • http://eden.pk/mycms/uploadedimages/editorUploadedImages/file/momifinoxixerisak.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16108c48f2a4a1---xanipodalesajov.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a8399a64b---84924748046.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/44188468042.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa68d3d05f6---lanupozuxe.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fe05e8201---70455675180.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f2a6f36dfca---duvifimu.pdfIn PDF document text
    • https://pubs-icfas.org/icfas_new/dev/ckfinder/userfiles/files/16548995299.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/ad7e4d47544453451a8aa4ff849bed16/83089077497.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/48043375945.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/98667123006.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/62578068825.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=histogram+practice+worksheet+pdfPDF 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_off0000ca11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA11 11084 bytes
SHA-256: aa49369ac2b42b1467745b7986376421625138ef3eb2a67f412fc27bdfbd2e4f
font_01_sfnt_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 16652 bytes
SHA-256: 61c44eab2f17854092c058a630e8a3e41098a7ed9bbc07510745d139cdaacc83
font_02_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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