Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7f03d2d2638750…

MALICIOUS

PDF

73.3 KB Created: 2021-10-12 16:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0981b3db6708ddeedfa2214db8de2519 SHA-1: 8575a351a4399f0f0070f7f0c912b85f9b12a0f7 SHA-256: 0e7f03d2d2638750e9b1fcad618cd5ea7d2621c7e71cbe5733afc0408e036297
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/fff58a236586589443af25232b6f2ed0/33076406362.pdf In PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/kovovebupofesuf.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/cce54111c2271890157b85f45d02495b/zitufinojipo.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/zizoreguxoriwepuf.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbab35b5a1---fidezulukijebozaxuk.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/70756215009.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/fopokole.pdfIn PDF document text
    • http://vinhthuan.asia/upload/files/tasatenubuligazazafo.pdfIn PDF document text
    • https://noventa.cz/media/files/file/77870172369.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/28826002611.pdfIn PDF document text
    • https://shiksha24.com/userfiles/files/rafikunavigaxe.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/68659100062.pdfIn PDF document text
    • https://steammining.com/userfiles/file/kuwasalifitukinotuviwumi.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/61510689877.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615fd91ede8c3---lufawafetika.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef3f334fbb---26088918587.pdfIn PDF document text
    • https://austarpharma.com/upload/files/feved.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/35487697606.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/82692468996.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/fukipekifevo.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/jomaxu.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/61623007697.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/fotiwu.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/getomiridimigutiwidoxajup.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/98230401187.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/RhDyTiV0TgQ/uplcv?utm_term=simple+gk+questions+for+class+6PDF 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_off0000b955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB955 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16C 11404 bytes
SHA-256: a6a826e72fd0811c3a7e901ca15e5321ec289732b35cb6d73e034577ea07e853
font_02_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 16816 bytes
SHA-256: fbce7ec6a9caf3f9fc0b16964998b95185a3c388380533991904d5be5c4fbe28

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