Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dee748eae278262…

MALICIOUS

PDF

84.6 KB Created: 2021-08-23 09:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 05f44725c8d72808a5471eca0aaa8f33 SHA-1: e267ce15507e6e2e93860c715da9f0879ccc1997 SHA-256: 9dee748eae2782629d7fa7bfc3198ff27d3f1bcf0194dcb8d73602cfa9756321
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised WordPress installations or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns suggest the PDF is designed to lure users to external sites.

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 http://quick-thailand.com/images/uploads/file/73098156822.pdf In PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/513d5b013c8cf93a94ebbc6befff885b/20460522266.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/16802342212.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/kbb3km4sitd9c3nuro41f1tm59/73049175584.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/ba70e99f1215a742bfa6addb903fddee/xonuwadogasu.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/16898791647.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/fotunaturifatiditaraxizir.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/98834507104.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/1601679986.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/4a2f776e8d5aad31af411e9cd6a3c672/zakageraben.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b90f6ebcb3e---viwojewilal.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/visivakoja.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/mirisaviduxire.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/07eba5963a34767cbc9ac8b8b32a3834/zivit.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/tirufojet.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609813b775b79---lenejukegefokozad.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/14443815806.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d38828a70---vopokobemi.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/vonofuweviz.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/lenutovajilukaxa.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/95b5bcb4c7b3b13c9443692ef56e6d14/wuditoxoxe.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/52678440379.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/76559867968.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a159e7720bc---12426834812.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+many+pounds+of+potatoes+per+person+per+yearPDF link annotation
    • 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_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 18944 bytes
SHA-256: 6cc29ca8b4a5f9417e0b47b23af5839f92f596f763d9e527f1328ebbc608870e
font_01_sfnt_off0001139c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139C 10812 bytes
SHA-256: 94ffe524ddfc3fb3016adf479ca21229dc65222456c4887ce030de2cad23dfe3
font_02_sfnt_off00012c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1