Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0214a2cf2c6d34d…

MALICIOUS

PDF

69.3 KB Created: 2021-07-02 08:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b6798075bd92ef467b87db6c523bd411 SHA-1: f5ba6a6fc65ffa7094881fa8fc9412f559faeeb5 SHA-256: d0214a2cf2c6d34da16283e497195efe8810e329e2d5155ba330a36be167a6f7
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the presence of numerous external links suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3891

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/70559801766.pdf In PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5b14aa96d038383b34f3a6c87247ab03/finavatutovikanasi.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cgktd971qv7e1qpolubpu3v216/wilemovadirenelanawum.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ecd79d6d7---83091393384.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/57694022148.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/4048536863.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/4874935535b806f9c78f019b2a87198c/guduwedigofilar.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/6eab4d59e1cd2a5c4b40fc484b53e2a5/62446951933.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae01811f4f2---1662337574.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/89cfecda512e6274db7c88e00bea9e21/36108630249.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160db84cf1dca1---wagajulogi.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/91997483362.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/egb1vgfd4g06d4v439n6uhcu57/99268695529.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/zapisonopapi.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/poroguvulitefilamanowivis.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/tiwojunenudoralisose.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/namavizezarifikodafo.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ral4j60vhuipa1q4je3788qi7b/fudajosilamukofutuwidotas.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d84ec2e9e---batupalolepilexugu.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/usfreipek6mnp1tjr68kfsc4rc/vuwudogax.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a64c263667---gekinigilid.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9194a1d1c1---japupi.pdfIn PDF document text
    • http://nhs1980alumni.com/clients/878257/File/22182840485.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846441c004b---junewukanarizuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=discount+tax+and+tip+worksheet+answer+keyPDF link annotation
    • 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_off0000bc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC92 11060 bytes
SHA-256: 733203bb252920e51170d0d8626d92f1e8f2f71e719485b13e71aede7f4d0d53
font_01_sfnt_off0000d668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD668 15424 bytes
SHA-256: b105c7b39535fdbe5a51e6f86c4064caf51bed741080602a11dc8cd9cb18837e
font_02_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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