Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f84eb8aef57b0bf…

MALICIOUS

PDF

76.0 KB Created: 2021-09-18 09:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6df1095a339fdbe48d92dfa9e1a7f4d4 SHA-1: 1a447a380ae34fb819af427711b05164bafc78d5 SHA-256: 9f84eb8aef57b0bfb6680424ddcd1e43f492ce5d181846d636d8f72e6fa41b28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URIs and the overall structure indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://garglob.ru/uplcv?utm_term=the+bachelorette+season+16+episode+1+putlocker PDF link annotation
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/guvovebepinevowunilabodoz.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/20029923368.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/rafoduku.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/nikax.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5bcd239cc---56953374588.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/21670431893.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e6d89311196b328b66d679f1fdaceaa7/33312639752.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/88181600638.pdfIn PDF document text
    • http://centrons.com/uploaded/file/12659300896138d61071f19.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/56831692281.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/76890595785.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/potasatanesusi.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/61899396535.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wajano.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131f4bfcc6ea---fifemaxodeke.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/ginizazekutik.pdfIn PDF document text
    • http://apvn.info/userfiles/file/lafozif.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/nuzeg.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/zujabasexipemetoziraf.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/22399766544.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/zamofudupevezimuxosekugos.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/53482428417.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/90985675011.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/05/file/20210905_015253_108.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_off0000c111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC111 11124 bytes
SHA-256: 9e02cd4c22f28114285e453efddabe62a64452da6d2e09556fbab58088cbc28c
font_01_sfnt_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 17560 bytes
SHA-256: f7f4bf38fb87707aad87c22d1a9faf12a949d7b91c4428493a39da7c909af18b
font_02_sfnt_off0001089e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1