Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7097118bd8a5ab4…

MALICIOUS

PDF

85.7 KB Created: 2021-06-27 10:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4cf3ff1d4da3088174f0e7bfbb8de0e6 SHA-1: cc4ecdf3a7e1a7eefd78a51a853c845df5ceba09 SHA-256: e7097118bd8a5ab4b84863ef7128acfcc998361cc2c3155ebea798eb8775e3a3
156 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and links to potentially compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and content align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://oniceh.ru/uplcv?utm_term=photoshop+app+for+android+phone PDF link annotation
    • https://anjingliar2.com/contents//files/65938164836.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/pezanixopitis.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/67776554462.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8821747a6---78385684991.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792d1baefd7---54892093352.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/banukop.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/d2fef71dc94fec1d46f0e65ce09972b3/fuvudupixiv.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/zonumelibezutuf.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad52c12e91---80022031218.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/cq6mdei86atq7a6buhgtp41t4u/52151368337.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/jiviwanuvipagapeperiv.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb23ed2d42---tajibipofekak.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/e7jgtkm44iqp83ireuc321tek3/roderomajexeroporozumegi.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/c21321ef854001f5fa813168ac0120e3/75140297976.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d05315cd4---sodefuwolarolamaz.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d979abe545---rifumisimusirimule.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160769102254f4---vetudogetumitalagu.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc24384d0b---27237479194.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/pvqbilvnlmdlees9hvmu0gsqi7/39605969909.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/95049924524.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4088b0eca---71765842174.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/4410263152.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aded0e1dd---pigazuzimipuvugujeni.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_off0000ec5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 17408 bytes
SHA-256: a9e8e0815821749e950d1837db4f9ed20172c58d254fc298a8620ffb26c1a7f4
font_01_sfnt_off00011972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11972 10548 bytes
SHA-256: 59e24311d196d0fe22ed891b29366479507044987e88dfaa661fb610617c3a77
font_02_sfnt_off00013177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13177 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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