Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8cc47ee4dbf491e…

MALICIOUS

PDF

95.8 KB Created: 2021-07-03 05:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 58f3afc786841ae7e23c1aee35a27f8c SHA-1: 0c17e840157be1f3bfd87fafd902f344fe5d6a20 SHA-256: e8cc47ee4dbf491e5d84b25883035ab330e3b5f731cc3b01a68f3e4873c5a77e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting domains. These links are likely intended to lure users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://stainless-faucet.com/uploads/htmlupload/files/22591913629.pdf In PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607c549c665f2---28593583982.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cffd150db1---tumozofalowa.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/pisulewozexodufosopeko.pdfIn PDF document text
    • http://oicenglish.com/imagexx/files/6335835971.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9da9263397fd5fe564bef370b7b467d4/70455848317.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160df80b6c4173---3990147888.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/zofovilutuvixosixuxarupa.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073ff0e8e037---bifakafodegekelowiwij.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/c5ob2lq56jhacdc8ci6dpvvbr6/14061336539.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160944d416bfaf---detopidowubixoziwagimuw.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/3ace724f66ece6029f6d37a656ab9cf3/pinuranudo.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/d79ee15aa5a5ec551c15145191d31d17/51232145862.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/v33k3r4kitvkfkqhk9jgkdech6/30980082034.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/ae4d6f50c14cb336289125ba23f4a472/nutokanim.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16098d774f30d2---dipugekoxukufi.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a40db1b158f1d3169b169cd5d8ab70ac/letopidujisadadikaguru.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/malunipofoj.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cadf34bf929---48459399068.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16074a64639e76---xibowinulinusepowa.pdfIn PDF document text
    • http://come2menorca.com/images/file/65122426694.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=made+easy+test+series+pdf+electricalPDF 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_off0001137d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137D 17644 bytes
SHA-256: 29358df2b4a0210ec1edd7b828a65b97c6aa9c90ec130104f419bca8a2f5c561
font_01_sfnt_off00014211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14211 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A28 10496 bytes
SHA-256: 69dba4da3ffec09ff64cd83961af19a68cd54a11d669fcfa443324197957c0bc

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