Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcee648d9adb4a5…

MALICIOUS

PDF

95.4 KB Created: 2021-06-27 07:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d6051cd8a11d32046a58fe43c08600dc SHA-1: 47d9aa9b5861f6de160766e20078b54a4b1a7990 SHA-256: 2fcee648d9adb4a50ff47d024c09f5a1c97fb6a14066e03c65ad7e8a33530ffa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised websites, identified by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the presence of multiple links to potentially malicious content is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c04d93d3272---nurubizew.pdf In PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b7933529adb---64121363132.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/zatazemosigaba.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ca34cc35a---92187924621.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8698f34f0---fidibezesepuxugedusope.pdfIn PDF document text
    • https://superpart.com/files/51598689523.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/48512348105.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/aba6b9aa4818d894edc11c8699e3f1b1/maketep.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/jijamuxalugixukojefomuve.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/tivofagumotemojotam.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b0d6df691---39803712342.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/95625098180.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607255ffdeb38---jufimevatejas.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/37981741392.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/4374e142d446c9d0a3cd1a556578eb65/muletitozivaselitojanak.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076859b000f2---44006035190.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/bakikaxokuturisimutegod.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/8237941397.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/wunizikejefamowafopemutap.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/81056469267.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fdfe259e7---24810328743.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea6148df57---7974030816.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/5aea73bf7bb6154eb2d5edc0a501dc9f/35651222033.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/32ea641c292fa8ecaa6b7257b1c4b5f2/dujepuko.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/texebufud.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/taduva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=department+of+state+north+carolinaPDF 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_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A79 17256 bytes
SHA-256: 8f62c09be3eef01109c769cd150b27819b607262b6c13bc95fb5c952a7506424
font_02_sfnt_off00015789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15789 10744 bytes
SHA-256: 7b4a5316649dd52ec6c1949a51422ca839798b419fbd2dae3bef46b205daf7c8