Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a20e9ec7fe661bd…

MALICIOUS

PDF

98.2 KB Created: 2021-06-25 17:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a05bd7bce8f83d306fc2e8f2436c9ed7 SHA-1: 3104d58ff7caaf1fd56e829ba221801da0767a04 SHA-256: 5a20e9ec7fe661bdc460a09aeb1ea7d91b7fac44ca1cd294a2877568ebe18158
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608a45f6846e9---doxawofikexopemola.pdf In PDF document text
    • http://orchid-daikanyama.com/userfiles/file/49954482854.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/kamaf.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/94171841370.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e861a604bd72f252ac2d7410f0a9fdce/22521571792.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/k1tsuv8qhdjbgkurpg0cdqk6s6/tepawumisop.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sirol.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f81016919---zemekukenip.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/b6c881d0a9c8979b81b6106ddd96dbd6/86455519379.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/bufofolomikuwuluwumugan.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8015cb28f---6079113027.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/9563128a18a1813788d813bc7cef3200/96328980971.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/54459821520.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55bd5dbe7d---13940701755.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/ragiduzitof.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160954ce159ad3---lebobovorilaziju.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f84fbf2d0---punopunezufadigufupisifu.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/giwoninuvedatulisufisanug.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0ada8c055---23502634722.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160923529c60c6---zaduxirivadomi.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d248918375---titogofokopuzadodarirav.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/kugr2u2thjko6m5k2apgfm7o2p/14341178188.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/f664f58632fcf20c27a23e57d60f67be/detosonujimifizajige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=english+question+answer+10th+classPDF 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_off00011d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D27 17352 bytes
SHA-256: 0ba1df2974ba5161ae664fd74960a2b3e05a0289588751f5d6097522a6612fde
font_01_sfnt_off00014a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001621c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1621C 11000 bytes
SHA-256: 702d8ed3e2d85a806985a6e8f89566b628929c801525afdc512a9efdd7745e60

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