Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf22af18949a937…

MALICIOUS

PDF

80.2 KB Created: 2021-09-20 01:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 55c04454b6eff42e0a0db4250d824317 SHA-1: 34b05a668143c971a9486380e2c19ea471af3f29 SHA-256: 9bf22af18949a93797ec36d65ecf458f9e85573cd1034e9d0ace9a80d032ab41
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a specific ML classifier and ClamAV detection. It contains a link farm pointing to numerous URLs, many of which are hosted on what appear to be compromised websites or disposable hosting. The presence of a 'download button' lure further suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://crewmak.ru/uplcv?utm_term=finding+dory+full+movie+in+telugu+download PDF link annotation
    • https://cmottaviproductive.it/uploads/file/61052124541.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/50415544353.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338bb4d2495---refejazabebipasemem.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/7vq8t0meaa89u4edvfc5dbfo32/tepatavosepopamuzibam.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/papametojupovemaxatofeke.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/bebawawafovina.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/96526092694.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/91047818274.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/21900226897.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/rakuwitudiresefijisaliwag.pdfIn PDF document text
    • http://kxxbs.com/uploadfiles/file/a/pupupa.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/24211240993.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/21108102402.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/saxajopupixogeb.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/wamuvobox.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/76747603467.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/kidejutobomisogajixikoku.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/75988545220.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/97063393761.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/xilepusalezalifidosu.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/161409bd672d9a---36548746109.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/20ea9710064ce626525a719f85a09892/72279925533.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_off0000d602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 17140 bytes
SHA-256: ef65a58dd5b9d12182c05548cedc00446d8e701464d5c1a808df4d516ab48461
font_01_sfnt_off0001025c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025C 10872 bytes
SHA-256: c99eb9ffc61bed513e8ef993335eb0aa075e0d5811edf0c8b4c8fab389f8bcda
font_02_sfnt_off00011b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1