Malicious PDF — malware analysis report

Static analysis result for SHA-256 c206b36edcbfda6c…

MALICIOUS

PDF

72.8 KB Created: 2021-09-05 17:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 989c4ca1ef931e69fd7572492cabb6c2 SHA-1: f6dbbc8f4ff88213598b2868fdedb46e5fbbbdff SHA-256: c206b36edcbfda6c96a5a86b2f2134c58f30c1ccff7e5b3491cd6f361964679a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous potentially compromised websites hosted on disposable or suspicious domains. The primary goal appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://xylemleads.com/userfiles/file/73014957717.pdf In PDF document text
    • http://broadgatecapital.com/userfiles/file/lufusokuxifowazibokiv.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1610ceca0bb13a---59589168213.pdfIn PDF document text
    • http://df-foundry.net/d/files/6702958199.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1451940bb8---befugovafosud.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607212b87f94b---82832006669.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/fowumofota.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202108301142393805.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ef52aff2a---sajakuvogoxuxejobe.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160769d6ccd51e---96396222125.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/62825388747.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160afe5ac0d905---mikevixozijosano.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/0hlsgvrg0viad8lt1pgj1tios3/38207101248.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3e85a4b5---94179801386.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/66151079389.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/buripejuzixupegadufifazij.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/luvod.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/42145256978.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/sakumoforufobikin.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d6d5892d2f013eeeb2a726dab658f672/94912663479.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/1c4271921ec4d03a4d7c14447becbc65/51695253926.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-08-20/images/files/todejotanawinivajugemakef.pdfIn PDF document text
    • http://medosojewellery.com/userfiles/files/76657161277.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/85599611301.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/51906185273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=multiple+table+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_off0000bf05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF05 15548 bytes
SHA-256: c2caeabd431dcdc2edfdb897530522f0bb5dd07b4cc5b0556fca439963704da6
font_01_sfnt_off0000e686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 10232 bytes
SHA-256: f65d440f441857168c92f6f729eee01ed843c48e8cc97dfd5e8fd95832bfa64b
font_02_sfnt_off0000fd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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