Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ee3401f9a50633…

MALICIOUS

PDF

83.7 KB Created: 2021-09-05 06:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 99f4589f3d644c6718674c5df7f5c60e SHA-1: 235466650e90b7ed2baaada6e3fcff7eef9cf677 SHA-256: e1ee3401f9a5063367b5dc08fdcd5fc44a6a10967830ae078fd072809393ee74
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. Heuristics indicate it is a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/r1emicf4uk7k311e7e1ccufhap/xanejixarikopivaleki.pdf In PDF document text
    • http://effektfilm.de/files/file/33159638746.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6770e17c---jegijosi.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/fcvv8r9olavobb0a6tdln6giq0/goreseluxexix.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/374bc87613edf9fecb38b652f9174bb5/56829557164.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/suvosexalifugodipidewer.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/fa42e5a12b71a5d1cf8d2fa957d05f64/newosojelalorifuj.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74f5d21a01---33903303805.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160887f67b8a73---5713767995.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/taruxabiwironexu.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/fudumerigafinaxosujuwug.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sa52loh6m6meurr8293l18iv64/xijoximitilesilew.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdb9c9278f---borabisinoxavalazomogis.pdfIn PDF document text
    • http://kcobafl.org/ckfinder/userfiles/files/7159011479.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/zerefofi.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125e42a9b57b---15766383850.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/bugovavajapomaw.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/50c675b1a866437a177bef6b8b9ec664/50899227286.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/33174852131.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/ximosifu.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0hdjjv0li8bh59i58ta4j2ihe1/gesutafimiximosu.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/9b5777637508e56fd97bbec20a8e442b/nunedumife.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/28161826167.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/biradotoletibawazidagel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=utilitarianism+bentham+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_off0000e0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B0 18956 bytes
SHA-256: ac57e48588a61826cb31b3c8f296d812ac09d8981f7987f8c9740f6dfd3a3b24
font_01_sfnt_off000110f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F9 10788 bytes
SHA-256: f94494583bbb3445af92f87724e3a13418342382e683b8fc915cb2cb3ae2042a
font_02_sfnt_off00012957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12957 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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