Malicious PDF — malware analysis report

Static analysis result for SHA-256 add0e692730924f7…

MALICIOUS

PDF

93.6 KB Created: 2021-09-20 03:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2f1bf12e9f7ada14c802720f94968c17 SHA-1: 7cf58b6119c989ad057033cfe3f0b3f6eb8a1027 SHA-256: add0e692730924f788640aca5791e6fa2bc0877910999d4a87d3a74fbb62975a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, as these are common tactics for distributing malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://ketchas.ru/uplcv?utm_term=download+a+court+of+mist+and+fury+pdf PDF link annotation
    • https://travellifeafrica.com/ci/userfiles/files/petodumujasupipolu.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__61376718D1B6D.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/27947693206.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/59873972473.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/rtbtargibvclfbarof8tofrj82/56856045675.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/50687841219.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/89361031225.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/56271028784.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/88301380377.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/gewidabadem.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/gisitupuzuvomajisolape.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b708342e53---jolufifojozalajuginoba.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbd0a892ef---jaxinesesi.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/77214074192.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/fikojetibug.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/87384079536.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8c2a0c749a17750595056b39f7988ddf/19788168653.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614057b8c7b5a---sejisoxafotidoweligojuko.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/60013665287.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/74440357072.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/81610911317.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/796a60e6b2709fb497306b2cc24d7d1a/96299629308.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/fozolazuguv.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/todomojewodawolefodutuvu.pdfIn PDF document text
    • http://chinalabware.es/d/files/jowegopasaxazunalifonunil.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/64326609528.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/27697307922.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/vakekezonege.pdfIn PDF document text
    • 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_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 18872 bytes
SHA-256: 0a487d30077ec44a4ae5ce956577ce0895b1cb249c8a090e7f411c99ad56847c
font_01_sfnt_off0001373a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373A 10948 bytes
SHA-256: b4a31a499dba90c333414d8dcc09e36d70e490a3187099bc99e185b02295a6a2
font_02_sfnt_off000150aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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