Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2ae350132fa1c8…

MALICIOUS

PDF

71.6 KB Created: 2021-08-22 00:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2834c5a7c5567b8b5946cd8dee215074 SHA-1: ce05e1588e54dd21d469ecd622be815603ec0239 SHA-256: bf2ae350132fa1c8fe98202309b4d56e89e112a5816df25f46173c57ba515113
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for distributing further malware or conducting phishing attacks. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • 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
  • 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://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e8369ce3561d57e401f297a45915c591/22125265621.pdf In PDF document text
    • http://maciejabramowicz.pl/upload/files/file/14186321646.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/68370379903.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/7428278372.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/gipuraxatanitunaramasirer.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753c2fdc250---39681044439.pdfPDF link annotation
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b84c3126a23---dunugumipikogatagerira.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/ae0e7d3e0e26a8a732d2637d38b9423d/2855256031.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/feaef338e6494868148e8ec3c3e355d0/29184354372.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/visixojajasexevimarezipo.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce0a980d01---45627078358.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/wufizibabibaredapuniri.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/32302084463.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/b5ccad47ed45c0493f31208bd2b21bbf/rodevebudoxusojoza.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/s75e5f43i6c34q0i8vgjgeetbh/67449588239.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/35a49bdf8dd95aa80042e08234524385/59995403272.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/megexoge.pdfIn PDF document text
    • http://sanmargholidays.com/ckfinder/userfiles/files/kufobegarebular.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/3c5a5b3255ada34a3f5c1927adab349d/86476248062.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/fugevodava.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/9773b80985ba5a0d9239b5971c415bf4/rejaxifonafosenodid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=titanic+movie+in+tamil+titanic+movie+in+tamilPDF 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_off0000b64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB64F 16040 bytes
SHA-256: 2efda093d678bf9d65a6cc4e95803b849e31b1aaeff5fcdacb7f740ea9057bda
font_01_sfnt_off0000e043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE043 10152 bytes
SHA-256: 66e557bcab60331e628a2449e33c6953cae492360c7ddb08e2a119fd0764f952
font_02_sfnt_off0000f6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1