Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a749c33059baa7d…

MALICIOUS

PDF

82.7 KB Created: 2021-09-14 13:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7970da6bf680e24ae8bf7a5e12c6be72 SHA-1: 1d9bb9167060e90dcee290977d00d7a12253471c SHA-256: 7a749c33059baa7de54b43f523e225cb8330653d850e98028d8ca3303b2ab4fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous embedded URLs were found, with several pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The document's structure and embedded links strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/2f263f7def76cbf3178346137ba2e2b4/wujinijixunujixijefu.pdf In PDF document text
    • http://ibshop.gr/uploads/_uploads/files/93021249234.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385707f0c7e---81891491161.pdfIn PDF document text
    • https://hoangmailogistics.com/asset/site/files/rarik.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/zibugafekokezilomu.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/97307384932.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/vokorineduwunarufo.pdfIn PDF document text
    • https://aokman-drive.com/d/files/16215646145.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/ludima.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/nisuvilebokopabepatutif.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/1022295651.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/wifalovozunoxezudopojal.pdfIn PDF document text
    • http://jsdarvin.com/files/nodudov.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/30964708833.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/mazaxufuvurosaturaje.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/jrpad32ka27m8vvr62oqm0atlq/fujalabavevomov.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/93481924840.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc28088383---lifozukibetibebil.pdfIn PDF document text
    • http://rejs2013.cycling-recycling.eu/imgturysta/files/44055969409.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/sewutuwobewebazafotaki.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/lukununupejiwigosipo.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/30125762906.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/vuguparuroko.pdfIn PDF document text
    • https://smartbrand.ro/mm/file/90384797386.pdfIn PDF document text
    • https://vleek.com/uploads/files/nalupesizigumiretudonat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pika+tv+app+downloadPDF 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_off0000df7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 10232 bytes
SHA-256: f2b7d0dadc69e22f334b8efa0fd7089abc2b8db5a84319b31fc644f70cbc7e18
font_02_sfnt_off00010eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAC 18276 bytes
SHA-256: 7bd2b19372f0f39ebd144848282767a6bb7eec67133311bc8fa3300097cc7403

Open this report in the interactive analyzer, or submit your own file for analysis.