Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b02a404c90aec8…

MALICIOUS

PDF

67.0 KB Created: 2021-09-12 01:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 07bf720ad7d4dfae6a80c8f5503859d5 SHA-1: 34905d07845664e32d80c0195026bf145ee1462e SHA-256: 78b02a404c90aec894bd999090c474897e29136c55fea244539b9c5de13536d9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to various websites, some of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://coretry.ru/uplcv?utm_term=android+10+switch+between+apps PDF link annotation
    • http://kaupa.cz/userfiles/file/mijuginawijexozejo.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/39208818016.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/lomigudumudi.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd8189c12a---rodew.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/15182750975.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/satotedavajem.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/ruvumozusuwag.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/75414455497.pdfIn PDF document text
    • http://shendaoguoji.com/data/attachment/file/xerifugagupobemuwutomezu.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/guruloloburigirojevuje.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/38689365905.pdfIn PDF document text
    • http://bulmarconsult.com/files/fabipogumixojasojivibunej.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16135a5b8655b6---nuvotutusobo.pdfPDF link annotation
    • http://guitarenko.fr/img/files/99786351324.pdfIn PDF document text
    • http://www.buildonhope.org/file/fitibitorisunitepodutiw.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/503bdfb58ce0a06a2af49d62e8da13fc/dasivot.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/zobofavezifavenurufole.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/92757500755.pdfIn PDF document text
    • https://rippa.pt/files/file/tanaz.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/gazivunatelaruvebanefewa.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/92122577016.pdfIn PDF document text
    • http://sbcnepal.com/images/file/21644286209.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/gelagufiba.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/0eb3uep7mdm8s9e1obc647r7j7/junoduwavokiwelizafo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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