Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3f45a771093716…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 05:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 747246a12daeb0e366e494213026c9b3 SHA-1: 0168013313fc289263b7ce9a291df72c26e52e02 SHA-256: 4e3f45a771093716c15e00592eae6f98a70fcd1dc6c1a1f2d8f923b3931c940f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=critics+of+neoliberalism+pdf PDF link annotation
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5463656eacf08e3103e9157f23a507bd/22156931878.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/d0632d9b6f761c950ac193745792f024/temojopoza.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161196e4a74e8f---35212741898.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/pexupanidajakadel.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/woxixilusaferunubam.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/lb3mom2k69jqkvdfduer22ejn9/kaketebopuwi.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/172333266760ffe736247d7.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/gabudoj.pdfIn PDF document text
    • http://samocvet.org/foto/ck/files/wejofituxegabekazakafaled.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9523a7a6eb---28431380542.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/zisori.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160847c42363d0---xuxujapelodurenakiw.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-7/file/galubi.pdfIn PDF document text
    • https://agenziadiviaggiocagliari.it/file/92709185774.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/lchihbb9i1otj4uv5nkthep271/rawimemetutoluteb.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcbdb3e252---98345110332.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/poluzumodun.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/5742cef819e867cb4e6c9a61474358b6/98397193741.pdfIn PDF document text
    • http://prmakeup.com/Image/files/21500252615.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/masajobasuxokirurerodi.pdfIn PDF document text
    • http://babamoleskine.com/files/file/17385054232.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/bopaposezidifomogumina.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/78740820331.pdfIn PDF document text
    • http://daikinhbac.com/upload/files/72713207652.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_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 10952 bytes
SHA-256: 9eb201b9d85298417a73db50e5ae00d630f6d718fff4088d68e1a5e16abc1650
font_01_sfnt_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 18228 bytes
SHA-256: 58d4cb476d768368cdd303cf7f56a429ccee7bebee94c52da6aea7a06840a3ed
font_02_sfnt_off00012467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12467 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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