Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fb37392ddfe4a4…

MALICIOUS

PDF

83.8 KB Created: 2021-09-05 04:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d0b1b98970c15123b2bf7e1ac4e5db23 SHA-1: 9a8420a612552b18d46c7b7058ba35fbf22a7e10 SHA-256: 60fb37392ddfe4a4fa78d26d9a7b58e7a86793b003aca69c3f3e929a609010b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://kapalishakti.com/ckfinder/userfiles/files/kepegu.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071658551ced---potinigofamajawude.pdfIn PDF document text
    • http://cpils.com/userfiles/file/murimuxoberetidoruvi.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160748f2173c71---zamafulotemuwe.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/72f7ca4417c3dab260b45172df2c9e3b/lumisajonokakapavu.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/0dc528fcc1f10759d73380b847be49ea/49553526694.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b2ba3fa8a---65502117056.pdfIn PDF document text
    • https://ivanamihic.com//files/30272477212.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/93634418096.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/zexupekumazo.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/vufivu.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3fe114209ae3a1581d46b799e4be2eaf/kotudopugufemelemapukuka.pdfIn PDF document text
    • https://asken.as/bilder/file/96484257910.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/1481891956.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/a3746cfd14f1214685b7f643bb3bccb9/logimitezukofopapatudajif.pdfIn PDF document text
    • https://magerp.org/upload/files/poroxisijewonepi.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e288140e3e---xaxikejusiboxosawezomu.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5dmhg26s2l1485sv5bor0j50h/zezokodufozelos.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/xofojujulemikej.pdfIn PDF document text
    • http://bluenanum.com/ckupload/files/wadokepipubunu.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105bb2919887---80751361832.pdfIn PDF document text
    • http://vit-physio.de/file/8043801253.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/907349580.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/13823460036.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0853b76362---27815383546.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de6bb8ae2fa---wasimotugebogajetixiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=elliott+wave+trading+book+pdfPDF 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_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 10872 bytes
SHA-256: 7538cbc737811df125cda5e2a9c09ee3a6c078e632c03d218cd305947222a1a8
font_02_sfnt_off0001133f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133F 17924 bytes
SHA-256: 638459fbf8064f0994061f5827e7759fd8b07b78171de1e2431ba37135a00b06

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