Malicious PDF — malware analysis report

Static analysis result for SHA-256 448bd21ea0f469f1…

MALICIOUS

PDF

88.2 KB Created: 2021-07-05 15:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ba403678fb36af0f7af03a25cef9040e SHA-1: ccd8a401623c76e55d8851b668dee5ce5e8d0ced SHA-256: 448bd21ea0f469f1bf6b6d4d8f20e2f37dbd0ca73ad900d05bc5e91fce89550d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pistant.ru/uplcv?utm_term=lake+point+tower+hallandale PDF link annotation
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e60e683df---sinafivelojifaxemumobivu.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/suwasuxesuwifumadegij.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1dd21ecf7---kazuroluragevujodikemiwa.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b38df34db6---52949449143.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/5d9am93jp3dlhgohaqgpac72f9/fabej.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/mogero.pdfIn PDF document text
    • https://digireg.si/upload/jujifosozeziwaxuzejovagus.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/304f6b9b4fa90cd1681ea718be5346e6/99226185992.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad358a2f000---8062533987.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/sowoko.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/12896388791563cd06d0ec540846c6aa/golosuwatifofarulimuj.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081fa95b347d---95360854137.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/komemiribexusupoxilaropul.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/bd1d81f75b2988fee9da6967eb6c601d/16043148761.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3441a37763f93da35d817afdf35fd84b/59951334667.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/72101305627.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/xolozabemovolabiwotup.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/51376755254.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ce8d7132601---3088833358.pdfIn PDF document text
    • http://dogable.de/userfiles/file/wuduxegimalivimuxupix.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/4291aa9ae4db79ab945102447281fea0/18273300459.pdfIn PDF document text
    • http://learningkey.org/userfiles/tisulelizajifutozo.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/9vn1j31nh8q5k9hccfvg63cjc2/46168489928.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5206217c5d---nubone.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_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 18520 bytes
SHA-256: 513b3ebbbe29a9c1104848fad33c747d23158e81616dad533e3d2a7910fece0e
font_01_sfnt_off000123d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE7 10456 bytes
SHA-256: 3f7753d7ce99afc820dc6267f923bf835a68ef37b61a2e64216ade26a55e36e5

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