Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07184b68015a9f5…

MALICIOUS

PDF

104.4 KB Created: 2021-07-15 09:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 21bef42fede08ad869a6cefe1eef8a13 SHA-1: 4e3916c69445907cd702c0c6774ba8638f86fee7 SHA-256: e07184b68015a9f59c711c263f5586ff5e194735d131b49543a850bfb5330a66
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations used for hosting PDF files. The heuristic firings indicate this is a link farm designed to redirect users, likely for phishing or malware distribution. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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 https://huntic.ru/uplcv?utm_term=repeat+performance+synonym PDF link annotation
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/620e372fb4325b0d15d70e6705ffc6a3/57070621448.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/142d17fed6c6bbe345959fed79763155/20856764929.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/tuzeposozolepi.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607463b874c3d---nevubejexu.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d802543af59---47757381892.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/7f5b83dede8996f9ff952bc62d93eb86/35420929936.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/takusi.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210608/file/16231478153910.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16079ad14b75fb---sadirutadufelo.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c452e0c2a---11241952803.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16083e19d4ead5---govepenonur.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160804313ac708---kebukixuregefivez.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160704dccce8c5---pedavakimikuvibawam.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/9bab793efb375c968835f676a4b904a1/11258398277.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/mimupinasususuju.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a77fcc9ae---12852222132.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756ce333388---lesagone.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/nadanetupelar.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/tuluki.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e1c4d6c7445---daxoriwi.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/fc437eb64c74ab8b78e3052128fcd044/wawegofozowofizikekavodi.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/lvpii3hv3fj0iiia07kk9flso5/27908732566.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA27 19596 bytes
SHA-256: 06db8f017f13336119c99757533fe938862ff6e72910ffd1eed3a75af5e7438d
font_01_sfnt_off00011abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABF 10660 bytes
SHA-256: 2d3065cd3e45319d478c72f2fd1b92e0c5cf954ab932163fea160df68b3543ba
font_02_sfnt_off00013341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13341 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B53 26052 bytes
SHA-256: 42780f5b90707eeadf2360f9e0abde6c38a52d69dcf335698a41303a424ad7fd
font_04_sfnt_off00018aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA0 1976 bytes
SHA-256: 6946fe32f65a9f8ee900675e08d2a7c0e7d3fa43b5ca4c99ec42fb38e8bb836c