Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b533edafd65e938…

MALICIOUS

PDF

88.0 KB Created: 2021-08-11 10:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ca63ba61bf3e986c368536568f08e00e SHA-1: 8eedb28b7d7d2986d4433eab841c8436a4723300 SHA-256: 8b533edafd65e9384ec0458fa676d80ed319b0298c546250e0cb3b548d589c2f
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kick+2+full+movie+in+hindi+dubbed+download+filmywap PDF link annotation
    • https://preprodpcb.com/userfiles/files/75730257484.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a028e838f---gowupowem.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/r1ad608v64j4g6l43741hbpcip/4256756032.pdfIn PDF document text
    • http://www.emploi.nat.tn/ckeditor/ckfinder/userfiles/files/tozisopuvigelirame.pdfIn PDF document text
    • http://minipit.com/data/files/newusawalasarojizovux.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d23e4ab2885---71754748916.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/zeviziratotu.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/78577405933.pdfIn PDF document text
    • https://polandpools.com/contents//files/1419659214.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/fewixuvozepuratebekaduj.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4ca8c5acbe---77377267893.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/de8f51223cc04273590f63ada8cc00b5/jozunakudewidoso.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/gvog2frlklh216ugf0h7qjgk2m/niwifizumobubeb.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/b22591f275f76ae571d1eda8d27da8d7/boketenoxoxapuvafo.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a55d7720201dba3fee15346c560ef0d9/zudosazi.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/lenolusosuzurotuxo.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/76891102889.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/43738152629.pdfIn PDF document text
    • http://expresskaliski.info/file/90812041444.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210625063047.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/tupobasowejajenuragus.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16206247853579.pdfIn PDF document text
    • http://normandyclassof79stl.com/clients/e/e1/e16d7b8530e96d8d426d6b963c92b0b5/File/kalunabeti.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/58428747622.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/30cb9007029c787a16d7964a7aada536/1772387129.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_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 11228 bytes
SHA-256: 866138ce3d7615f41226c7067fcdb63dcbef7f8408e18ed46d108b776140b5fc
font_01_sfnt_off00010dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC4 17128 bytes
SHA-256: 4710e2cc98f286bb8ff8dddba5c4abda50f7deb3b2723a8e5f55bcf14a270662
font_02_sfnt_off00013a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1