Malicious PDF — malware analysis report

Static analysis result for SHA-256 02af8e2d18b6cdba…

MALICIOUS

PDF

78.7 KB Created: 2021-09-04 14:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 91f0df4a522e75b249ee8c32a3c1fea6 SHA-1: f1cdd139ce0fa0cd8fa3843343e7a753293b9caa SHA-256: 02af8e2d18b6cdba4a994d5820a6288cc5ec70a215840709c47e1b42cfd2b47f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16070c7274a445---wugunaruve.pdf In PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6279eea86d---79874634990.pdfIn PDF document text
    • http://yejida.com/userfiles/file/zizoxatemivik.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/67304007e6dd7211e9e35abcc3623ff2/82504987828.pdfIn PDF document text
    • http://falls67.com/clients/50406/File/bosuki.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608048c76ef72---redudini.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b82f45faf---verakiduzo.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/lekerugikoma.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/xiwakiteraxonukaruxa.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/7046006431.pdfIn PDF document text
    • http://eva.am/files/319d4fe8923fad94.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/wupepazovas.pdfIn PDF document text
    • http://sdes.in/uploads/33767999657.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/gubafidise.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/65720834443.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/47840459050.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/4c6d0k10kvtv2ag140cjkkaf41/7671320721.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/22288729120.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/datodi.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/88976505877.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcca76c216---77342771831.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/zawebusijuwevuxek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=premature+atrial+contraction+adalah+pdfPDF 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_off0000d089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD089 16988 bytes
SHA-256: e3ca82b4a82416eb958bce50202cb60dbfe10c26dcea8dc56575a77d2070e8cc
font_01_sfnt_off0000fc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11491 10820 bytes
SHA-256: 9e14cdbcf5adacedb929d7baf232610f8d1ac72dc48cb6b0bf09a713e07b3233