Malicious PDF — malware analysis report

Static analysis result for SHA-256 d114fa2e98c5372e…

MALICIOUS

PDF

74.9 KB Created: 2021-09-10 20:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: 7b67424b9d55f2fd89673c40774e7055 SHA-1: 8a1a73aa79f1a0f84234b19fb1247ddd507f2eaa SHA-256: d114fa2e98c5372e5787484a227f22e86bd546419014d4e5876ba143e80114d9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://argol-editions.fr/userfiles/file/regozijewikirizeza.pdf In PDF document text
    • http://neodentpetrosino.it/userfiles/files/nemexu.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e2bad80a7---30705954105.pdfIn PDF document text
    • http://nenorm.com/files/files/juvenen.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/162090284.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/70516837683.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/79069094427.pdfIn PDF document text
    • http://misbahelmudii.org/ckfinder/userfiles/files/29968250218.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f6c1cb7c6---rizudibixuxo.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/17113571357.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/67128275458.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/zevukixoremapumopoj.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/zevivalug.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/makafajaluwawukapoz.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/39526234512.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/bigemaz.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/11800622234.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/1219853700.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/49375334702.pdfIn PDF document text
    • https://songhongresort.com/img/files/78781164797.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/senesunarowezojin.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/71330920630.pdfIn PDF document text
    • https://penal-garazh.ru/files/revopufa.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/697877618.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/85593191797.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/tusibedijedorusikif.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/96768438762.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/dovegojidepitezalo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=word+that+starts+with+s+and+ends+with+yPDF 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_off0000c0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 17272 bytes
SHA-256: 4024ecbe4137d3092bbf627fe336042b7a79fb07f5b06139b2e1bfc728b0a2c2
font_02_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 10492 bytes
SHA-256: 05241ed6ed308275dcbfea51b3a540e80d7cae246fef7744a86886fb6dcbf8c0