Malicious PDF — malware analysis report

Static analysis result for SHA-256 048cdb0a3f5cf21b…

MALICIOUS

PDF

303.4 KB Created: 2021-06-26 02:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b8843359072c0a7687137328f63c91f3 SHA-1: 8feb7d75ce848862c7fc254560e3bd5e5a897176 SHA-256: 048cdb0a3f5cf21bf0457b37967fdd9bb554e78a0677b3a33664bf19e016fae0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a link farm pointing to compromised WordPress upload storage, disguised as a free download lure. The embedded URLs and the overall structure suggest it is designed to redirect users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://aawyx.com/sites/default/imageuser/file/23984846994.pdf In PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821555b87a3---11317987978.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a6c676f2b---60465945444.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/53a83e28f56732d2c992876af86f75ea/jufagosesuwavasu.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c6437aed526---77173916977.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1dcebc6f5---taradusujap.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/sefoxesuvepobur.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/11431679858.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/map6ak837sanvjr5r88eqck1p9/45095315333.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079720640e0d---dofuxe.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/d12eebnrcnfrhm4s3a342q7rrm/xumijazuketujes.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/xodasulozalitimokavaku.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/zegupub.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/ketobofefoxoz.pdfIn PDF document text
    • https://cristalensi.com/public/File/wivakagabuwavabuxiv.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/beuju89ekel8d4r8h41m5mn9jo/4396397968.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/69742196575.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/28813316277.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed3a8497f7---17779058162.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/g82182ji2qf91n0t08dghgok47/ruvetexop.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/80768387485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=download+one+piece+episode+500PDF 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_off0002cba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBA2 152292 bytes
SHA-256: 4750297c145f1dbc38e690a6902fbc0349852ec5f86e1f2a099d97e56093c729
font_01_sfnt_off00044bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44BFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00046414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46414 10652 bytes
SHA-256: c3bd829bb8110c13a869fb5a8c0667e8b1b41398800c561c510dc9fd552c7492
font_03_sfnt_off00047c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C93 19048 bytes
SHA-256: a33ecb5abc08d0b303d8862e6929e9d925574aa9a2cd33e2cee06d9f68b03552

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