Malicious PDF — malware analysis report

Static analysis result for SHA-256 767eb26e68fd15ef…

MALICIOUS

PDF

91.7 KB Created: 2021-09-03 14:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f9ec02ed17a787a55f96bcdbd68b7cf2 SHA-1: 55ae8c874d68226b3a943cadcb51b8e9d7f35235 SHA-256: 767eb26e68fd15ef0472036ddc8fc7bfc17631dc82781e213b9feded096d332a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by numerous links pointing to compromised WordPress sites and disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external links and the overall structure point towards a phishing attack designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://laborke.ru/uplcv?utm_term=keyence+il+sensor+manual PDF link annotation
    • https://soalmatematik.com/userfiles/file/50855838827.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/sonemosekaxuke.pdfIn PDF document text
    • http://nfc.soo.jp/file/nawifujipinapenol.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607685b057abf---16718995256.pdfIn PDF document text
    • http://grandfiltr.com/files/file/xalasupiruzijapa.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/xatimotiw.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ff08f147e1d348e4a7496df5b4d4f6bc/97018952196.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb1bf134f4---sopekanusedimidedozamaduz.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160863ce5ada7a---tupowoxokesoxujupigonulep.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/ab7377cc8095f807d684beecd73d5701/wanadujamezexudotu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/u8vki1siosm8b893ttfeeufd03/94931180576.pdfIn PDF document text
    • http://carszana.com/image/upload/File/ruxigine.pdfIn PDF document text
    • https://luminex.pl/upload/file/ruwokeviruwewazugavan.pdfIn PDF document text
    • http://scro.ru/pic/file/26849708858.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099f2ee83f2d---6918171143.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/bukidodu.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b7p11138irlf1ktoduf2d76mi/nulixidakaxe.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/96318208237.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/53804832315.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48fc83fec0---94511150227.pdfIn PDF document text
    • http://geyuping.com/geyuping/uploadfile/file/2021090122550373499.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/76096382727.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/7242869249.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_off0000ff30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF30 19032 bytes
SHA-256: de21eab503617092eb797f183f5e6ef1be59930f4dc342d7e42ce8250232cd13
font_01_sfnt_off00013178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13178 10496 bytes
SHA-256: 2c3e1812245377c1b758de2266f82adc9f260a9c2cbb04926801bec41a6d28d9
font_02_sfnt_off0001495a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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