Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed5e6d2e750123a…

MALICIOUS

PDF

96.9 KB Created: 2021-09-02 09:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1c0738cd5424b063f689a37bf283c4e1 SHA-1: d40f0c744f6307e7ca8a30ea129884d19623ccf9 SHA-256: 5ed5e6d2e750123a939e70386dcbe0c0f22355b0d137efcf8941c2eded1312d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple URLs pointing to compromised WordPress sites, indicating a link farm designed to obscure the final destination. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this is a phishing or malware distribution lure. The ML classifier and ClamAV detection further confirm its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/3f3b04e440cb5f11080ba1eda06b857c/faxuwavadetonilubupibexa.pdf In PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/87959116624.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/75249009183.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3dece1bc9---55374478783.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/67fe4670d815189eca2e355b2093e113/81400616146.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/8fdc97bec11ea5fbcb127ec362bd1bb8/65910800444.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/latakugejokivukod.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ebd4a686ca497e0c39b35035fd7aec29/visopotitawagas.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///rezolomapatatajupesip.pdfIn PDF document text
    • http://bigredclassof1960.com/clients/879476/File/tepowenefalemibo.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/remof.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ffdc9c06c---jekodanegomegin.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077db26c6c31---xoromeduxubinipu.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/85b2583ba6209e648f6d8759260c44a4/74765902072.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bepurenod.pdfIn PDF document text
    • http://oris-am.com/editor_up/82025384604.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/104059db50d8aa415c53f187057428bc/ritanisusokonevodofuxeso.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f678268b1d---tixojevatiwupiketo.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/23087150793.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911b78f07ef---venotosidolupupixejim.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073a3907b40d---60578249708.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/62839330715.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083298ae05de---63751953092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=html+canonical+tagPDF 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_off000110e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E3 20640 bytes
SHA-256: fc6aed1dce5693a1e305d76c2ae234fdb919d16930dce1278363dc565fb78936
font_01_sfnt_off00014619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14619 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E30 10164 bytes
SHA-256: 2548d9ce6c6b0c785e8f09fb375f19cf076b4c0646ee44723f927dde845a5c34

Open this report in the interactive analyzer, or submit your own file for analysis.