Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcb1f430eb25cbd…

MALICIOUS

PDF

67.3 KB Created: 2021-10-01 07:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c75b2319b52b41a680d443b293001a0d SHA-1: 52c0a4e3fb38b1ef75ba5d4c83231d7bfec4ea43 SHA-256: 8dcb1f430eb25cbd9f20fe48ec79c104b2f5552b658a327fbd9e839b83f21f82
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs that likely lead to further malicious content or exploit kits. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a large number of links on disposable hosting, characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=download+clone+hero+songs PDF link annotation
    • http://didaconcept.com/admin/fckeditor/file/28000098435.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/75378571176.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/86942032314.pdfIn PDF document text
    • http://ipceurope.be/assets/file/jugafowuvakiresov.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/48896378583.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/temavunurasibota.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/polojop.pdfIn PDF document text
    • http://adveotec.com/img/file/xaxasefezilivowogaw.pdfIn PDF document text
    • http://compsult.net/userfiles/file/menobopefefemafep.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/lunojumanazekabeno.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/bozobu.pdfIn PDF document text
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/45756331239.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/bifawokov.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/37881955254.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/xunifexat.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/73549494271.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/15421883135.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/lajewad.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/kavanavigoxewusifefunirim.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/21715139547.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/zoxizu.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_off0000ab11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB11 14944 bytes
SHA-256: fe4778e11a0e7cbb6d0a58d1847e3b493c2ca73d6e0bb7c7700b7dea9496d191
font_01_sfnt_off0000d048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85F 10544 bytes
SHA-256: 43fd68cca4636147a754d5752590b2d91149701517a963aeaf655b7e0767e38a

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