Malicious PDF — malware analysis report

Static analysis result for SHA-256 f111156e74e79381…

MALICIOUS

PDF

97.7 KB Created: 2021-08-18 02:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac7c65d175245ac9b5e005df54f9fc48 SHA-1: 85085ecd3123ccbf0418623d5d117c82f0e76942 SHA-256: f111156e74e793813251d39fdf39b35f7f68d7f3a3ccf4a5180035fa785addc4
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 critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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 http://ithalattagarantibelgesi.com/resimlerfiles/tokiguxezolutewafadiw.pdf In PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097af0f1607b---13249010728.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0d932bc4d---29841819367.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/78117129528.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45e70e560---23452914008.pdfIn PDF document text
    • http://etkenkalip.com/CodeignterProject/vizyon/files/fodavaxofi.pdfIn PDF document text
    • http://email-database.info/userfiles/file/nuzuvabipifabixunojaduxu.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/84521385557.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/17984254278.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607312d41091e---tuluvoxavitima.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/95836478238.pdfIn PDF document text
    • https://artenika.pl/fck/file/viwude.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbdb8dcfdb---soleluponibub.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/zozefegelolenerotelor.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///94639007485.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ogh47o6ivgihkqdieorc2n2tir/69191353875.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd3d3c3ab1---nilerijono.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7486590172---jixarisuw.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/ratugijarege.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/gabomebowopaka.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/13386748210.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/15532102665.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/sarudawiduforinanaxa.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085696c033b9---50384805186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=sap+crystal+reports+2016+sp07+crackPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001014e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1014E 27852 bytes
SHA-256: 8d85389025aa7abc8891e281497a962cbb8972506dacfb45ce1cf6a581056dbc
font_00_sfnt_off0000e78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78C 10964 bytes
SHA-256: c168addc7fdc828e0a36e2687a87399e31b2f9f2fe3c3ed7e62ed1c6f42bdf9a
font_02_sfnt_off0001324b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324B 17012 bytes
SHA-256: eae71f5c9b91feee54f1701684c79998289bb7e36fd8a746cc3cf56bd39bea99
font_03_sfnt_off00015e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1