Malicious PDF — malware analysis report

Static analysis result for SHA-256 46493d33f4ddfb94…

MALICIOUS

PDF

133.4 KB Created: 2021-07-19 23:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2228acf990bffd9a104e582657bfa2eb SHA-1: 3cd1bdb7e0bafd8be759bf13dd76ff5f6dd12c24 SHA-256: 46493d33f4ddfb9427f63a9d7912bf5678be20cdebc4dd3beeaeed5177679fbe
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites or other disposable hosting, suggesting an attempt to obscure the ultimate payload or C2 infrastructure. The PDF structure itself does not contain executable content, but rather serves as a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9491

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://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/21366731aae57ef27c5b145405220916/58124984467.pdf In PDF document text
    • http://righetti-ticozzi.it/userfiles/files/xumipozef.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3af798492---rarowogimiresigakesaju.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/130868a4b1543b3788803139930e1351/bijamepaverobubagoj.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c28422c785---3102011607.pdfIn PDF document text
    • http://kimthienbao.com/userfiles/file/jewemudadizoranowenofak.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/91880466660.pdfIn PDF document text
    • http://huntland.hu/upload/file/paririnojeda.pdfIn PDF document text
    • https://cecprint.com/images/file/tunupanofi.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78cbf95d98---85679088329.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6e027c84---sibufelikowudi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/dd7018eb2d8ae31fe2ff2f22beb92b4a/1279998202.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/nitegarikuj.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/f5uqlnmu8ektbft5d404vvl9vf/fesagi.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608655b506fca---gubofelukopoxurobofoges.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/kamofikojilimej.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160acbaf373d58---jijufalowonemavuvoxijela.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/b0d98uafji7j3q23edd096q0qs/63842931747.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7294350c8---75557303958.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087936bd5fb6---59657863213.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/16761245722.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85c3399a62---pibonut.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073de8870ba2---29819081558.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/jefavazulalegubeloxelubu.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/60798106410.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/50t3raq4ph0c0hbfblmocqiu96/bizasizepirajolododu.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/rkqc3e8nbup2oui27qokak2671/vuvuvadowejikonaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=in+at+leastPDF 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
font_00_sfnt_off00018e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E57 17664 bytes
SHA-256: 35ecd6983f62b07bbe0e8dfb9a2a48812c037d20715c6f25aa7199340644eb70
font_01_sfnt_off0001bcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCAA 9740 bytes
SHA-256: f053d8ef3832e22fe94ee0c58488c2e121df2f12e4a56b9f4d41ffa0a870c21d
font_02_sfnt_off0001d215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D215 18400 bytes
SHA-256: 1dbd91a056dc98b00d4f32ced3f7d01c699276ba2e81e91f98f93031c6300ae1
font_03_sfnt_off0001ef49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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