Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c05d2da7d5e457…

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 16:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 04aadd4cb9652f38071317ad614139c6 SHA-1: f1ec0e73a3f8187fee3505e9ce7c93886e9765a5 SHA-256: b0c05d2da7d5e4576d45925bafe00d78fbf12767d26616a1b3ac7f9079ce1807
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure and URL targets suggest a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0dcbced47---82660801874.pdf In PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f93483d7847dce11abf16ecddd1c5368/63874536412.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/pawugimatirigu.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/9e20bed5f5f5b93f7353355f45f3bdb0/viwuzutepob.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d9802df28---mavaginupanobonavixiwadi.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/sanebawexinapebi.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/5b953c6763a87b94e44a4ff32c8a615f/xojopeluv.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/72632647287.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16080d90318046---25845318043.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/86197273976.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160972689aa306---lasopatumibomarawodogo.pdfIn PDF document text
    • http://trhs1966.com/clients/b/bb/bbabdd843433c1cf4d3e80624837507c/File/64736893700.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/sonixikudomewopejazelo.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/gijebejuxudozamidew.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab823cb4c75---34379579547.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/e7e7daef219c7e67fb8521f9100630f7/zivujesoluso.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce0ad829d7---lagoxulovof.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/7679141230.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/pazigavi.pdfIn PDF document text
    • http://tort-art.ru/userfiles/file/gilonijukurinet.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079598cb7c9c---fuverunesigerajepokuwapob.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/12498460007.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/93842029070.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=atharvashirsha+in+sanskrit+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52E 17560 bytes
SHA-256: ce118d4496aa676d08bda745617690d2dd74752d55577526db71c37d0e442c02
font_01_sfnt_off00010221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10221 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 10436 bytes
SHA-256: b9b526756daac2d224b8490213877d79d3aab2fbae841da058fbea0dd63dd0ed

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