Malicious PDF — malware analysis report

Static analysis result for SHA-256 1103edf8faaeeb40…

MALICIOUS

PDF

86.9 KB Created: 2021-09-17 13:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f44ba4084ed98195b1390c242de3384 SHA-1: 3bb5901f47f5359bc506d0535a11d85be4542b19 SHA-256: 1103edf8faaeeb40c1a16091da2fe3653c07dd8623aa9e368642276288b0b717
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, likely serving as a lure for users searching for content like 'tenet telugu dubbed movie download'. The presence of multiple external URIs and a 'download button' heuristic suggests the document's primary purpose is to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=tenet+telugu+dubbed+movie+download PDF link annotation
    • http://kennycojewelry.com/userfiles/files/202109/1630801700.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/xamafexutuf.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614468f64d979---36282483573.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f6e8c566e---fobekowivufoniraboxesiniw.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/fopitatuve.pdfIn PDF document text
    • http://shesob.com/file/files/26974693715.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143da23620a3---91772237037.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/janopovenafizimavoz.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16138c3c98955e---21511905425.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/pizorafekuxono.pdfIn PDF document text
    • http://travellerisland.com/files/4312318240.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614435cc79925---20703833194.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff98d1dbd5---wunakarigebadiwexizujana.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/24876264729.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/ralelorixikikotibomireto.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351ec375452---gaxirigam.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/18184355698.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/ferudibabosixil.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/norojekopodo.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/cb1c45676a29c9184fac45c91eeb9e76/jezomokurubukujiz.pdfIn PDF document text
    • https://exam10.menapoint.com/app/webroot/upload/files/kunuziru.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/80637858911.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/83983677858.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/juzewugaxon.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_off0000ee9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 17900 bytes
SHA-256: ca19284790226d4f4604cfa81f144b2dbdf0a1aa876ca510fbd9fc5cff429e95
font_02_sfnt_off00013586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13586 10676 bytes
SHA-256: a97655e18b3963e6d71fe262705a6f369c27abd9ee933934921862ca888a80be

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