Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee949094d3ecd0a2…

MALICIOUS

PDF

97.0 KB Created: 2021-09-01 07:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9be4fc94fb8005936e6d095b6f366127 SHA-1: 2e303575bc43afc628bceafd9a80de03c1889374 SHA-256: ee949094d3ecd0a2d43bbe669ac70e3548bbc7dc7d857582e2f3265380336470
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://catamma.ru/uplcv?utm_term=introductory+speech+about+yourself PDF link annotation
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/fivodosox.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/3892385594.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71477adfe8---foxuvagukasugen.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/mavub.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16114951035d65---lesatigifivupejozedejugur.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/vavad.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/ue0t3of1oikam1cbpdc3vkuclv/vuvomogo.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/587786243612470de4956c.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k41s4mhgiso6ikirttvu39ne47/pikegiwitaju.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/mimimoto.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/um84jntbnruu7iksshe76euk89/41173225988.pdfIn PDF document text
    • http://screen.by/images/file/rasuvasa.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/tugigorajuminikeravox.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/pegovutikax.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/mogamumitajefun.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/96297904221.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/wimuvapeji.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/galen.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/8b0n5cv5u2plmeasge0qs1n7h4/riwobage.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/702230be27a10179c3bd446492301374/bidofedez.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab587c7162---diguziritusisare.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/gikatukisakavunovibuvog.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096fdd4c6e80---xisewekuzero.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_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 10928 bytes
SHA-256: ec09c99aacd2951a722f7c0bdafb2f966454314747e9733dca683a604588f186
font_01_sfnt_off00012d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 18940 bytes
SHA-256: 772b9f6eea8396319d76c3eb1c14dc069149342bffbc966c6755342f937434f5
font_02_sfnt_off00015e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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