Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e40726218351bd6…

MALICIOUS

PDF

98.5 KB Created: 2021-08-13 20:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 51998e4826e3f09ac6ff547e65232363 SHA-1: 8542f08513fc5744080de8de870d3993661f9012 SHA-256: 7e40726218351bd63bc324f54806d198193fe5624356f0015791d16152f60d3f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. The embedded URLs and the PDF structure suggest an attempt to exploit user trust or curiosity to lead them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/a52016c7b541e02c86b5f91adb535d4b/jipol.pdf In PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/76443147634.pdfIn PDF document text
    • https://rovetco.com/userfiles/file/xojimazunonemom.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bab1692cc---kidokavugutuzemibeta.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfce685670---torelamulikiwugu.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/75283812045.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62b946f005---75274662956.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202107/1627704634.pdfIn PDF document text
    • https://spacio.hk/attachment/file/75088567328.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/xefopesiwud.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d632624b8---11720741216.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/12091392987.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/novewave.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/xifivepufafuseganuzedom.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cbddd1f48---12378687020.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/zafesapejugiw.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/31630746364.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c99ab358e9---46615001069.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/manosojapuvelezawipimoki.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bogu1oogjs0hgm7dhk974ph593/zitubi.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a15a1b5043d---kamosu.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/99e2d6ee467e5a1b1c09c9db531e6672/80340850955.pdfIn PDF document text
    • http://ombs.ru/uploads/files/46006981480.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=como+pagar+darf+atrasado+acoesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13229 10752 bytes
SHA-256: 906f8639e9da76859b48c0109cd5be930690ff72aaa848d0d319835facddb97d
font_02_sfnt_off00014ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC0 19164 bytes
SHA-256: 22e8d0f8e135efa67aab26a7a660a05b8b11eb2c653fec3e1d7cf7057a96e6bd

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