Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fbd9f6459f138d…

MALICIOUS

PDF

132.9 KB Created: 2021-10-13 23:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: eb0387f339d09139f20f96bd5b9664bc SHA-1: fdebd757eb86a20185a85e5201f5be42ac78679b SHA-256: 60fbd9f6459f138da36ec06253ff0bc62dde4f24c511cc0d771accb6533c1e67
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable hosting or compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://messtores.ca/fck_user_files/file/ropebopojiranavefo.pdf In PDF document text
    • http://classicalgardenornaments.com/uplds/file/23040986215.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/poniboziforurikezido.pdfIn PDF document text
    • http://nut-shell.net/upload/files/fegivimapabisixikitalevu.pdfIn PDF document text
    • http://thietbinuoitom.vn/uploads/userfiles/file/batezamugimakupa.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/pibosu.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161476bd29928b---denagaragigejav.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/87773444513.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/donumuviguletikat.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/650979e749287902aa190580e06fc44f/bevumavapevosowofire.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/rarogagurutilemitisik.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/76428678446.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/19915566117.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161401633b3342---fozuxapirogigubidejut.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/xilezugojutuxizud.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/81695911322.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/kudomozulaxogakoravuvetuv.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/36978531498.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/48313669277.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/damobiwesavumojababi.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/57148939465.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/56779214750.pdfIn PDF document text
    • http://boq.internet-match.com/upload/files/77075236472.pdfIn PDF document text
    • http://e-menu.hu/editor_up/25505261206.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/Z3ufxtS7Wvw/uplcv?utm_term=year+4+multiplication+and+division+worksheetsPDF 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_off00019776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19776 11184 bytes
SHA-256: 2058ecf3df2338ca36dfec271b1441b547669ae4138a8590b5de787af2c15b23
font_01_sfnt_off0001b17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B17B 22888 bytes
SHA-256: 3226d4b6896efc8f65070aadcd530d121bbe41cdf904959601f6c6e976cf1e47
font_02_sfnt_off0001ed33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1