Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee304f3510b08ed…

MALICIOUS

PDF

73.4 KB Created: 2021-09-01 11:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b8827af0fcf91e9a4be52d49aaba3de6 SHA-1: eb5f1ad082acb15c4205a1eb4a8f7e192e0cf0ed SHA-256: eee304f3510b08edc62d97d807ec406c50275a6a71510af010a67f419f395f41
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://krisoc.ru/uplcv?utm_term=subtracting+mixed+numbers+with+same+denominator PDF link annotation
    • http://acecaalcoy.com/userfiles/file/vavos.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/kawowovopotisomanusivik.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/899c4d797fbb4e979268d9b0235fef0a/biwudoravizararubewiguwu.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/13805456454.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/gejeg.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/mamuwuloluva.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a70ab9252---13825348005.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/260326329653.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/kibopefexiziviwil.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080468421711---begadaxe.pdfIn PDF document text
    • https://parc-hotel.info/file/ganuwabivosasawogoxawiri.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3048446c09---14809912718.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/64232260964.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/7e21727c9065514ef7833bccbde845ee/liluwerininevaz.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa85b39ff6---58909830711.pdfIn PDF document text
    • https://tomas-music.com/contents//files/41170463128.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c2085181d---nivexibolago.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6c78276c9---66354600407.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/xajikirew.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/ruxogowexidigunaladixim.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df453e262c---21262398788.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/tavejevopeteg.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/51837111225.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_off0000bafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFE 11276 bytes
SHA-256: 52c01c9eb0a4a8ff34f47845a5f68b00f16ad171a5b6e9f713f5429d68754a97
font_01_sfnt_off0000d522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD522 16380 bytes
SHA-256: 82466e1c81d45e97cacfd993653931377549f538a7722a35aa31ddf8ac82f932
font_02_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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