Malicious PDF — malware analysis report

Static analysis result for SHA-256 62971a60a1889513…

MALICIOUS

PDF

80.3 KB Created: 2021-09-09 06:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c4d2cd33e11e359834edb383e4f79dd SHA-1: d6f39be9540dbccd5c1e4ae7db5d171b14b9c15b SHA-256: 62971a60a1889513af76de1dd1c2eb8d536329c7707ac1f5db4ed65d8335578e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly suggest malicious intent. The presence of multiple external URIs and link farm heuristics confirms the primary function of this PDF is to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=pok%C3%A9mon+platinum+nds+roms PDF link annotation
    • http://oxigensupplies.com/shipinc/userfiles/files/vuvozakudobeti.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202109070459533594.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161312d05c53d2---69775339592.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109051829378430.pdfIn PDF document text
    • http://rigosarchitects.gr/userfiles/file/tasafowad.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210909091320.pdfIn PDF document text
    • http://learningkey.org/userfiles/dopotod.pdfIn PDF document text
    • http://mytrangroup.com/uploads/userfiles/file/luzutitizopozokoluv.pdfIn PDF document text
    • https://patc.fr/imagesfile/74899502333.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/f73891a8e9cfca6c09bc0ce6315d4593/7637708443.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/junaguzumijonikerijir.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/90037381173.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/95600635795.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/zukovututopujep.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/wekatafixepawisuvakotenaz.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210901095549.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210903122840.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/gomaxiwa.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/simurib.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/6869450359.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109072035255368.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137ab8040f9e---69139158451.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/bc2578b96dfbd7e65164f5c19cea1338/darekavufodir.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/68622873567.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/99750821362.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_off0000d0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C7 18616 bytes
SHA-256: 4058240be916c929a3f38539b1bf953733f6125f504ae77bc21874c2abd8dd96
font_01_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 10768 bytes
SHA-256: 9686322e03371766bb226bf571470b06e3229bb198d82e6d344b28fa4bb36d94
font_02_sfnt_off000119bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1