Malicious PDF — malware analysis report

Static analysis result for SHA-256 363a84a43ede4bad…

MALICIOUS

PDF

85.8 KB Created: 2021-09-16 15:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: af034118a74f325c34942baf03db84f7 SHA-1: a8533e7544ad354fdbfa45e06cc478b17a4c2408 SHA-256: 363a84a43ede4badcd298b1c84dacddfbfa4f1aedde76d6d552a1d5885e2f4e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, characteristic of link farms used for phishing or distributing further malware. The PDF structure and embedded content suggest it's designed to redirect users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=font+style+for+android+phones PDF link annotation
    • http://printrun.nl/userfiles/files/fokikozemumifufenog.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/24169127894.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/8611677580.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/75550525138.pdfIn PDF document text
    • http://snft.ro/media/file/lofededuvetojifisizixa.pdfIn PDF document text
    • https://t2sc.me/userfiles/28121915285.pdfIn PDF document text
    • https://bursaphotofest.org/uploads/files/31759753152.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/84508340202.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/lopulawogufarukeximix.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/gatorapab.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/5a15d2c1341f67fbd24d03ac4d2e3d42/mapajelu.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/44880143626.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/dufigukesazogolopagi.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/sadizusetenakexiziropij.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/19593130718.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/68327249126.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/75033369528.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/49131530960.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/44306044883.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/gevetakoxavele.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/82516111536.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/fimofibij.pdfIn PDF document text
    • http://net-work.cz/data/file/giwarixewitadabavinukipak.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613433d0647fb---muwisewusewabalupufamiwez.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/dimudizufakomareba.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_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 10684 bytes
SHA-256: 2fa1e63eebe47692d019de5f343f5e8a74aaa80fb90ccd76084e7fc99fb79de4
font_02_sfnt_off00011afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFD 17620 bytes
SHA-256: b60a0941c974d965d8b5021082e00e8e1c9de570584bc471db48d545e4a3425d