Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e09c502be4d8eb7…

MALICIOUS

PDF

87.6 KB Created: 2021-06-26 02:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9622cc91b809a4b86434a11feb18707a SHA-1: dd27464a61a13bfa3a7463f3ba3d6e30b189f235 SHA-256: 3e09c502be4d8eb736b69707268903b65984a1df688f0e054b4b55e836929311
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable domains. The heuristic 'SE_INVOICE_LURE' suggests a phishing or payment scam pretext for the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/dalvubmjj7l6f4onhqjrvdpue4/53658390365.pdf In PDF document text
    • http://songhandiban.com/uploadfile/file/2021062310330873499.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/xibivakomuritirezapubi.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/bc493b8551e1541feecc4559004d65d6/69953454293.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/lalevesadejisixa.pdfIn PDF document text
    • https://tsegypt.com/file/41132026255.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6da1ee6fa---sidotumolebazum.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/dusuzepo.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/6h68k50fti2htnuubls8p73jn4/74561826450.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/ketuxapobinonugavesedolum.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/gapabedevopanu.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/kazidowenazixolevuvis.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6659f0b0ce676dacf104ebe5703a8fa6/fenutisu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f5c5c826a---jupewoxuwoxosigatorudo.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e697a838---kosudikokiwizojepozurof.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/be1f4457c8858331a229bd3a0049054f/narudisefulejugu.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6cdd935cd---tudabaxu.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/31450048834.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/dolufilome.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59664385879.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606fadecd6157---12158202701.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770b9d2f65a---32128586646.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/41b0a35f9feca1bf297404211e294e84/tatejimijiwevedino.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/59381422206.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/zibesamugelogenadimupe.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/8r3oko8uekk8f1993s3alrdia1/69314810789.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/u23i710pjcdbe9lgnv7k7g5h1k/74524276690.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+make+pdf+load+fasterPDF 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_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 10632 bytes
SHA-256: d6730bc57106e667e306d011be978cd0a911e10cc3955fe5bd600b62e29d89a3
font_01_sfnt_off00010b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 17312 bytes
SHA-256: 87dc8f9bfa0ba7ce7bab4625710c7992c37282cc7353b1f739e9af59030cff01
font_02_sfnt_off000138d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1