Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f00b3349f404abe…

MALICIOUS

PDF

69.6 KB Created: 2021-10-01 00:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7ca5a2ee82af02012aa1542dfb3d85df SHA-1: cabf8d5b56b1e9aeb5230c6fd616ce4746c89129 SHA-256: 2f00b3349f404abeda22a13ee3009403ab55e409cbeaba91f4001b0355dc1ec6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://medvor.ru/uplcv?utm_term=electromagnetic+spectrum+highest+wavelength PDF link annotation
    • https://conexusinternational.com/ckfinder/userfiles/file/nibubumawilumubadu.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/zuvovigijowowesedop.pdfIn PDF document text
    • http://mastervin.ru/files/file/76374412030.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/pegexalozowoturutupalifaz.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615626f1cb63b---32858725860.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/868c44462bb0492809aae129c52e59f6/tewovoxubadaguwa.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135608093f45---tewixipajejikix.pdfIn PDF document text
    • http://klpa.net/userData/board/file/zaxemanubisadepuruluwib.pdfIn PDF document text
    • https://timminsrenovations.ca/file/vN6S7U3qt6peZb3i.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/jipokuduvizodufomuwaniros.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/96544197715.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/16385637507.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/jibafopifa.pdfIn PDF document text
    • http://yensaophanrang.net/userfiles/file/putobujotuxivek.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/23258780521.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/96737548692.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/ninabonuwifazuz.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/lubitalefagug.pdfIn PDF document text
    • http://czyxchem.com/upload/files/91346641076.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/36403243017.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/61907835923.pdfIn PDF document text
    • http://rilta.net/userfiles/files/55893616936.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/saraxojunomufuvorebop.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/20470772136.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_off0000b080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB080 15360 bytes
SHA-256: b2579f7fba3fc935ef9b8421ab5c88b43530c2af0b2bdd499e7adc2ba110231e
font_01_sfnt_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 11056 bytes
SHA-256: 987009ccccceb568b5ceac390e3613815c047c9843a98f61213a692b26a8eda9
font_02_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1