Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de2255e9b4f929d…

MALICIOUS

PDF

156.4 KB Created: 2021-07-06 08:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 318386157126c7bc7f3408f4e387f3ba SHA-1: 80677653256e3bcc23f3f1185ebc767a3558e233 SHA-256: 7de2255e9b4f929de0117556049721bbff54e68399125cdca32a542c7008436b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9246

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://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/127c2cdee5b7de10b80487b2553bb8bd/lowuridot.pdf In PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a3477520e---xiduzuzazid.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/lofogukozuwabesesumiwimo.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/fd872d71011528e8d823ad314e47ec07/88713748280.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc14058002---fixudegegetag.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5dfe62c1f---xekizebataj.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/cf24d3a835fea27cbf3afde3db19728d/fomenofifarekukuloto.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cc2e50bc9---zovenonu.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/11402350800.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160adae79a754a---70334066576.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/76dc0cee15c2d01430e1bbccf0017b86/tojaxuti.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/55676065869.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/98972449259.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/zusifuwaruxadevumotud.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/vilugedufesose.pdfIn PDF document text
    • https://seerupit.dk/assens/file/8552793385.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/cce3c1a28cf154ad19a8695a8957d713/59614345438.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8dc7152c---zujokomezuvisomuvixeluw.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/fef1252bb9ce03bd9658577cc02521e4/ganolamibupunave.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/tupinusekusakikafose.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/gcjo7ieu79j3qtg2u8v1s2n44l/melefanazesem.pdfIn PDF document text
    • https://jobtiara.com/files/files/firoxifulunerinazurabaxo.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/nowipozumunaged.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/32779073753.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/b6f8969fffb40a24c03b4b8f097d28d3/52297493364.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/35248966012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=proverbs+about+heartPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D561 10268 bytes
SHA-256: 7067cf1d558e1dbcab836c8282131f707317dae7d3ee243ba46c910c42c86d45
font_01_sfnt_off0001ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECB5 26008 bytes
SHA-256: 233bb852276ba4234d467e182fc9e9a4406d6555a4f9f6e13640b6a8a4e45446
font_02_sfnt_off00022ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22AD9 18756 bytes
SHA-256: e80a9cd7405713a1acbb8a364d0dfbc8e48f03eaa4a13c197c7886ae57538db7
font_03_sfnt_off000249d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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