Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3afbbd3f6f04df…

MALICIOUS

PDF

86.2 KB Created: 2021-08-19 10:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: efafeab21e59db09ede7e60bacb49a05 SHA-1: b36448f7508fa8ffb6cb1dc47d57f0864fc1b2aa SHA-256: 2e3afbbd3f6f04dfb22f73aefc68e5618effcc781a702b349ef074c90b8ea3bf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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://ilpeace.org/assets/ckfinder/core/connector/php/uploads/files/56869701034.pdf In PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63501dd633---xegonef.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3d404347c32c09c03b9bc97ca4a9973b/bojavu.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/b7eaeb05222879b4ddd0178f25d0b9d6/sataz.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/97635827497.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e46b595e7---jetejavizatarelo.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c50e78667e---pekulit.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/manidifopumimulom.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/87404212491.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a60ea10795a---botogegozaniliri.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aecd9485006---82689264077.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/77176639683.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/54124813857.pdfIn PDF document text
    • http://apple888.vn/luutru/files/fowuvodurigoz.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7239724c---momejuwijaxi.pdfIn PDF document text
    • https://zenkenmoshi.info/images/files/file/rafalut.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/nonaxojip.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/tt1t7rag4sjcjcvbm6kgbj79l5/wufapogivolofozere.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gekejitipixeto.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4levs5e8nk1iglikahaum5m93m/67959323509.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/0b38c09eea76c36bf61890ffb649b450/figizepoxutamumew.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/35410425151.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/16324476516.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610070905b3c0---wuzusilakiwegolunup.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/vuvabe.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/ecmn9ijcjm9224rfkbdfbcvla4/79172111769.pdfIn PDF document text
    • https://lecachet.fr/docs/files/44259501924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+turn+off+peloton+treadmillPDF 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_off0000f17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 18368 bytes
SHA-256: 52dc439934a653f1624a9c27b1fed060604126a773387591b4f8ec1a425a7ede
font_02_sfnt_off0001396a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396A 10668 bytes
SHA-256: a23ecfb3437408b3e867dd5a0c032a90e750f9dbd1e0c9d7210afb77d8e2b91f