Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97e68b5da7e22a9…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 13:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 82a7a33d39559c1b3eac8a3937c24d01 SHA-1: 040b5a782379f7e9ffb926c6f11ae27a36cf9ca6 SHA-256: e97e68b5da7e22a9f22ee18921d6c00e0e92fca6fd1ccd631438e57f7d411a87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://yule-sign.com/upload/editor/file/20210727012313.pdf In PDF document text
    • http://satakantaresort.com/user_img/files/senifidabekupomujidof.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/gutagemoxivox.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/10505629516.pdfIn PDF document text
    • https://ptogel2.com/contents//files/99026804041.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210821080356.pdfIn PDF document text
    • http://dalaichau.com/files/89107072537.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/19643524000.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/wokitifirideguradiwugin.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160abab366cc58---9150462901.pdfIn PDF document text
    • http://artio.pl/files/files/51841142089.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/daruxuzu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/4eabe000365600b4f7c062c977b8a526/nukajolelisipezi.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/gasazaxab.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/wanovabekugifixasotupa.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/097947304ebdb17b4942f600bb9bf602/87320947086.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/35768740725.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/mupigafarelebakukoburuna.pdfIn PDF document text
    • https://lapakunited.com/contents//files/61460037062.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/bekubamo.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/zejix.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/82844607477.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/vajawup.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608b0318b24ab---kimiwidivazolagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=kettle+reboiler+design+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD9 16696 bytes
SHA-256: 4815f9ba9d3fcd6b9dcb03685db1753ae588502bd9c753e24c8922f164d07399
font_01_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 10644 bytes
SHA-256: a2efb13ca0cc30dbaa612fd61ede08b151298c58a52bcdb8419a5d1b301f5516
font_02_sfnt_off00010efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001270d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270D 18368 bytes
SHA-256: b3d1b0ad0a247d3b541ce9eb6210ce8ebdad7e6559697f091e69e255cf6fb52e

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