Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2734168e73e591…

MALICIOUS

PDF

95.4 KB Created: 2021-08-02 15:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: aa2679107bcd59e48500eb49b6fb5d0c SHA-1: 88d499b60c00f2336149abb1d08560f4cb733331 SHA-256: 2e2734168e73e5914939097bd8162e8654d6e6b62bc8b04490dd184992b9c93f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16098a88b093f4---bifegawifufiboz.pdf In PDF document text
    • http://pileshoppen.dk/userfiles/file/memenidegilefat.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/8718531468.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160989ca7074d1---lewaz.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/nixirurufokonadozun.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/7au48it0n457ohbmtfjlvcv5p5/xesetokopezeralo.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/kitatosa.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/resokenetoriges.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/linolakekedovavu.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/53359556790.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cec12a232---xefupevapanova.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/61538967440.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/63648336921.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/mojan.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210530033254.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/83360844052.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797eb23aaa9---lafalefar.pdfIn PDF document text
    • http://dgjst.com/upfile/file/lamowes.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/bijigok.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/bifonifunezidev.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b0bfdd6be---peboli.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffef821a12---fazaniwixefotutiwa.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/bubitose.pdfIn PDF document text
    • http://humicdp.com/uploads/2021-06-23/images/files/mapupawumi.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba8b30170b---36501670711.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=definicion+de+las+4+capacidades+fisicas+condicionalesPDF 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_off00010cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFA 10492 bytes
SHA-256: 6ddc1a9c68893b7b06f0aeae95e1e20eb3e26db4b52bb885c88deb81e2fb257c
font_01_sfnt_off000124f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F1 19036 bytes
SHA-256: 4e02c8bc7e2c75ffb0c073f19083f125948d25f6ffd7797646c0dda75c1d06cf
font_02_sfnt_off00015567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15567 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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