Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e8a26612b4e270…

MALICIOUS

PDF

94.7 KB Created: 2021-09-04 01:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8c5791b58e2622a57e30a99a0eb44a9b SHA-1: 02a251e5cda17133e770ce2ee8cc1bf03a625971 SHA-256: f8e8a26612b4e270048005803f4b1f382208a953c92c9d94a0d9d0b500e2de3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic of using disposable or compromised hosting for link distribution, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://philabc.ru/uplcv?utm_term=autocad+civil+3d+2016+manual+pdf PDF link annotation
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/3f53cb187a71b5919ce0400231427a83/kiwezo.pdfIn PDF document text
    • https://coil.hk/upload/files/bodirofufebatezexokalopus.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/25452182789.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/70298381003.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/80422196.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/70514303731.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/jusofilexufirowuwupuza.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e0bfbd944acf07843ef767d184677c7/60359922075.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/latipowago.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f9d45273f6aa0870271ffe152ce4b25c/gajixijolitise.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbbcf99836---pululapaxesajoki.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f63354bcc3d---ziwisalewagigazigulivel.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/lalivoratavixorabuti.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/patomowuxaku.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/55751002325.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/pisoka.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/33221521215.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/jewukesilafefosaf.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dcd503e83---zopuvemejufubotavabika.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/84669239614.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/zowizatileso.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210528210228434.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/83827490260.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160724146ccad5---12530666857.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_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 11160 bytes
SHA-256: a54c3113e69aa76dc891c579da5fb3509d3b928fa2ec3824a0be89919cc6898f
font_01_sfnt_off00011c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 21628 bytes
SHA-256: 2dbdc1aff5901bdb45495074ce7f046b910c7a6423f5e6e6caacb7fcf58982b6
font_02_sfnt_off0001535a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1535A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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