Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e9a5b0e9e92cd5…

MALICIOUS

PDF

91.7 KB Created: 2021-09-05 14:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 24fbc99b7d1ecc64c133ff2af9788cef SHA-1: ab9e5e8bd86cdc8b2a8df52996a37c2803b2968f SHA-256: b7e9a5b0e9e92cd5ff4420af52ab8356b97e323ec78cfc879576778d4bf6d1dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://coretry.ru/uplcv?utm_term=sales+management+simplified+mike+weinberg+pdf PDF link annotation
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612c2f4a19634---61074033748.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/lugajodijerekezifosovub.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/fajokijezoxud.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/26964719743.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/a12b7af3fc5b2440115e2c1ef3bc63f6/97674092905.pdfIn PDF document text
    • https://coil.hk/upload/files/16739216564.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/dd8a6e47d1b821d49a7e0f012c6c7f30/pasev.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/2d454bbed93187ee364b6fd45bc09d49/lupaji.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ba230b0e3f560217ac1e26f9a01e78f3/gisapijo.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/siwakuwipejojabisurur.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2736b20aef---45934677748.pdfIn PDF document text
    • http://dgjst.com/upfile/file/37146899065.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/13756750559.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ba5694e038---birowar.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210901111301.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/wisekipunafexofa.pdfIn PDF document text
    • https://gulamanis.com/contents/files/popimegoxim.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/50bd88b4b2422de0a262f53f93d74591/88014232313.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/82620507962.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/56866572984.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/tifonifimikaved.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lpbq2u2od82sk71d01mejieh05/24473726248.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103e2a08b6d3---57669428095.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_off0001001e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11835 11112 bytes
SHA-256: b6c0b4a9bd79a28c4d45479df99e23f7689a70d6f40ee6155525f9beebc1ccdb
font_02_sfnt_off000131b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B2 18284 bytes
SHA-256: 8fa92957c7b5d428345b2e2892d31f04fccf74ab48526038158b094213afb122

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