Malicious PDF — malware analysis report

Static analysis result for SHA-256 615024914a20b475…

MALICIOUS

PDF

89.8 KB Created: 2021-08-22 04:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 946bc82a983fa7054a2e6823c50299d6 SHA-1: c8e44708dc774b7a1063df13f10bad5f45bc6d34 SHA-256: 615024914a20b475d56abf5b7db05d974dde8189501f6e6ec22f04751d496173
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself is not directly indicative of a specific exploit, but the external links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160adbbb7c4eb3---39860223551.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b83405afdc4---38666154387.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afd7f5f2c77---65909879395.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/9627282c4797eec905a0cf35a00e50c7/mijatonezokutufitisewoje.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/17524145212.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/ada803a0bb5a41c7c60145b4ae86e9f7/52805649898.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160791eb9a1d56---lamijilututotukipexir.pdfIn PDF document text
    • http://vhshf.de/File/peladelegiveful.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160cf3f256adc8---25765906992.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/wekakamubep.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/barunufinage.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/94ac721fe4cdea89677b6acbefd6b05e/ziraxerifowuk.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/99296221625.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776cad3b5b0---66635186116.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/pipudene.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/14952578592.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3fc866dc8---bamij.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8b447dfad---vilire.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-15/20210515085505460630.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/48460136195.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/998t61nrrml7to5vhsvtomfnc4/84791011125.pdfIn PDF document text
    • http://sfera-vlad.ru/img/file/8083162901.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/96181966604.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a857f180270---gigukuvulanag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+secrets+of+closing+the+sale+zig+ziglarPDF 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_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 16984 bytes
SHA-256: ed36d1e26639c445c9ca50ec08880666f1a2407d9b0f2eaa490c885276f426ea
font_01_sfnt_off00012952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12952 10636 bytes
SHA-256: 96df19bc59fb4eac3ba9e608d8bce71f3e614153a76a9ec1ef68436dc13224fa
font_02_sfnt_off000141ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.