Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ae81022f329124…

MALICIOUS

PDF

73.6 KB Created: 2021-09-03 03:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 030e327e1a6c567957882688b71217a0 SHA-1: ba3dde3163ece2f7b1532b35b0ece15b39362022 SHA-256: 89ae81022f329124e4a3833e0029679b16b8c9bbd5e59186d7d4122979404a4b
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely serves as a phishing or malware distribution vector. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is unreadable, but the presence of many external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a malicious intent to lure users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://smartmedia.ro/app/webroot/files/userfiles/files/29406709945.pdf In PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f1f08371c89fb0cc7c128e81ba4b2d30/88584543673.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/52902640597.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/tawokolojoniza.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072b2d0aeb49---6574438496.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/36794009651.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/23206821501.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/44838759773.pdfIn PDF document text
    • https://oferta.lt/i/File/dibegononixin.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/bumarul.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/77532970947.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd73131121c---zubusoju.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/palevalosidafitobubuvip.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/talagedevelu.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160721a5abe68a---34891855528.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bac8e50c8f9---70380636876.pdfIn PDF document text
    • https://ferropula.hr/files/59022607012.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/sugexise.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/wekuvodibafi.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/83827534724.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/5dcbb75f2607b63128c6925a3bbadc22/15566690654.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/libonagumifuxovido.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/fukerawane.pdfIn PDF document text
    • https://clove7.com/userfiles/file/wuleteb.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/3m5uj5issgsmajforg3db0vgm5/tivugelafofanif.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/hs9fmed4qnd7408hekjshcisto/loridusigifez.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/39950146897.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b7d80aa55---kukifiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=emergency+kit+list+pdfPDF 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_off0000be8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8F 10872 bytes
SHA-256: 1279ccd1b942d3296d0a400a30d83626346d49ef99d9a70064665a4336ca71e8
font_01_sfnt_off0000d762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 16232 bytes
SHA-256: a1517101e6ddb49484033eaa8b6bcc146d062f66d7642ac3a6e2e5f4bc06552f
font_02_sfnt_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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