Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeec29da83e7548…

MALICIOUS

PDF

82.8 KB Created: 2021-09-04 14:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3633727d453c40a563dc81e2253c5629 SHA-1: 71d98c5aec246b166218a728a3f7257940a92c62 SHA-256: eeeec29da83e7548ff6d0edce515dbeb4772569c86373549ac4b89707fe9cfd8
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated maliciousness. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised CMS upload directories or disposable hosting. The document body is heavily obfuscated, preventing analysis of its direct content, but the overall structure and URL analysis strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://deurenhanger.nl/userfiles/file/dufonelefuzajajoxalol.pdf In PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854b8609f01---21346522564.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/fuvirazenikomufilawipasip.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea4a4d9af9---98777922324.pdfIn PDF document text
    • http://imaginove.eu/data/Files/11355615403.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/zubusuzafodunuvowenide.pdfIn PDF document text
    • http://pololanna.com/user_img/files/zudetixev.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/95868977843.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/94454383537.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/eca09d1b6063326432031b28cbf96f27/mekevurese.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210713123317.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/lobulofujomaraxivije.pdfIn PDF document text
    • https://cafe-malaysia.com/contents/file/63536172743.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160861dc3976f4---44846398356.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/98u2stlsv7ce222qr5smlkd516/46620895813.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/75f0c123fb2a34dd427993080f2fa906/burajusizelopogamos.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/050bcdca039d610bf1692218baecc3e5/tosor.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/buxakovititozixunemegeput.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb584f48c9d---gulewevo.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb06d41e14---boluputusanin.pdfIn PDF document text
    • http://beateromer.com/bilder/file/26135033565.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c70915a75b---nadiwoguf.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/vemenetokowixoxexuzugo.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/mpj34lrm3ra7uraeb9dtko28ja/vakekovejurever.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=aha+acls+provider+manual+2015+pdf+freePDF 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_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 11360 bytes
SHA-256: f63bbbebd59e47be27f7509fd6924b063d30240969f90056b4b856bdae482450
font_01_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 18344 bytes
SHA-256: 88d05be819ffafcc6d1c4e0b220c3beff49928040324d8b80f62091e61309e32
font_02_sfnt_off0001255b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1