Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded56f7e2897668b…

MALICIOUS

PDF

81.6 KB Created: 2021-10-07 00:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6649781d3c010f203be3502fbf3e56b3 SHA-1: 07a2f1c03547f0bca2b11fe0262179b0f5a3863f SHA-256: ded56f7e2897668bd393612e7c88fe22301af33dcd7456e2f37801afceb7a21c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://synerhu.ru/uplcv?utm_term=minecraft+skyblock+download+pc PDF link annotation
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/zofuwogarujipitig.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48582047630.pdfIn PDF document text
    • http://hotechike.com/files/files/82829799827.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/18851411495.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd413037ca---89528954024.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/mupunenujo.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/wexirizigolo.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/94670674925.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/47549114323.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1633255414.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/60489064663.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/najuniritejisevufigidow.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/7vcr8r5i5e1o52jki2oi0h65dh/dobuvasopatubasoda.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/18277968155.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/74329196361.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/jitamajon.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/xujevotowev.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/52214653908.pdfIn PDF document text
    • https://jss-moms.si/upload/File/33584932816.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/kikupanivefavo.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/xoxaruxodiji.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/lubewulimalasiwatoroga.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/xuxogibupidobejiposafab.pdfIn PDF document text
    • http://webbuilders.com/files/file/begeguluraxepowegazelix.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/74061646274.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_off0000d8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 17964 bytes
SHA-256: efbe3587ea798ee3280684c0e0040f8673849f039143625f31f92ac5bb375011
font_02_sfnt_off00011ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED0 11040 bytes
SHA-256: 6ef384261895dd207d4866df05bb5fcd01ccf86b1696b5f88410298eae675d0d