Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ccaf0f6d93fe34…

MALICIOUS

PDF

82.1 KB Created: 2021-09-11 09:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 38d8bacc53a1443e0f07de45a6a367d3 SHA-1: 4f39df362467ecad20282d998d6ab5dd4726b3ed SHA-256: 01ccaf0f6d93fe3465cc1a21ceb4523d01c1b7bd512be2a26632afb76a914f0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of numerous URLs, including one with a 'utm_term' parameter suggesting tracking, points towards a phishing or malware distribution campaign. No scripts were extracted, but the overall structure and URL distribution strongly suggest a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=free+indian+tv+channels+apk PDF link annotation
    • http://pes.edu.mn/ckfinder/userfiles/files/milula.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/lakoragazufipamarajale.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/21d6etqfo4la0iv9upfd51aafh/82117749723.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/29403882987.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/90057650052.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/lipisojagoxuresanibom.pdfIn PDF document text
    • http://travellerisland.com/files/25566762477.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/23958089443.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613889b9ab220---talewarusomub.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/40484998515.pdfIn PDF document text
    • https://suruburi.net/mm/file/72378036107.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/xajijebumokoxibokaxoja.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/mumuwirivajafasiri.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109050751505682.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136f5366c1de---nilewuvoj.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/78471416223.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/32047732945.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/18797495984.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/43251991115.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/didov.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/95351908214.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/37168016308.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/zitosonurelugijudaxiri.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/zevijotovu.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_off0000dc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC01 17728 bytes
SHA-256: 772fc745168ce90e034f3a44810e135eccc30d4297b5b73fc77d9378fe8cd34c
font_01_sfnt_off00010a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 10624 bytes
SHA-256: 873eacd37b64cc9c602c1b2133569d89506c8ac3e6e5149dc7407c14cf5962b8
font_02_sfnt_off0001226b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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