Malicious PDF — malware analysis report

Static analysis result for SHA-256 454723119b450d4d…

MALICIOUS

PDF

90.5 KB Created: 2021-07-26 04:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6aa3bdad1fb4673bf015404c2c6dc745 SHA-1: 612e0d48743b4294cb9f6217908fe98fa55cc566 SHA-256: 454723119b450d4dd1ec917b41f3201606ead0d6a254c3a95798d318460c6994
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607eee96804d8---21905237892.pdf In PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768f8fa0d14---tomodulez.pdfIn PDF document text
    • http://dhf-china.com/d/files/pilagozo.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a62755a29d---77700028130.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/30066787472.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/zexekisa.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/wazunuwet.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/004470fcc2c6ce76f77f41a3ab699aeb/juduvufegigapapa.pdfIn PDF document text
    • https://ip-pharma.net/data/files/kemetiwolinotagalokoler.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a285c8f3b76---zitetugiloruwasepasatimaz.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/wosutijexeba.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021062500532773499.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/0e2ea1d64abdd389b67017483f44941b/79787804208.pdfIn PDF document text
    • https://denimder.org/resimler/files/rexolopipekuluwir.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/29f39599344830aaca4e80cfebccbcc8/49390442002.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/791cca939e2c63a271c7793c5c4dbcad/sijujibivotar.pdfIn PDF document text
    • http://drironcat.com/images/file/vunisugaxiravaragef.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/38907320188.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a73bb613b6c---95949151350.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/galetixemumapusizivubu.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/letafupuwiluroz.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/62259343471.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/nerupexibariwuseluta.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/78017965317.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=%C3%A9tica+e+moral+leonardo+boff+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_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 20480 bytes
SHA-256: b7df904f8158b74a114318ff9b598eaad541ff66c83f64e78e6b33b84212351d
font_01_sfnt_off000128a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 10752 bytes
SHA-256: db19df18ded5cad8bc804ef55878335e9475d6184189138723936ed2e7a062ca
font_02_sfnt_off00014119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14119 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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