Malicious PDF — malware analysis report

Static analysis result for SHA-256 736e12055f12f98d…

MALICIOUS

PDF

85.0 KB Created: 2021-09-24 22:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c1c80320e18f9794d7c0b414ca423b47 SHA-1: dce83beb3d78cf861254f591a6c22ed8ada3fb37 SHA-256: 736e12055f12f98d22c371e3df54f48684fc42c5a8154a6d33c7dce22acf0fb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is classified as malicious, exhibiting characteristics of a phishing lure. It functions as a link farm, directing users to download content, potentially malware, disguised as game downloads. The URLs point to compromised WordPress uploads and disposable hosting, indicating an attempt to obscure the true origin and nature of the hosted files. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://laborke.ru/uplcv?utm_term=download+game+popcap+full+crack PDF link annotation
    • http://status.cz/UserFiles/File/94560508636.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/tigiladosiranozujosar.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/newobosukunujunav.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/976b5c16614c5c5ff0f92c6ce49104f2/21021248231.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614029911a013---23044722333.pdfIn PDF document text
    • http://sabaparsian.com/ckeditor/files/files/ginexapuvus.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/98078313127.pdfIn PDF document text
    • http://unibox.lv/files/text/67582997042.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/78274665788.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/memamipunixupeguxe.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/mulofafirew.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d6750c6a95---83453433963.pdfIn PDF document text
    • https://coil.hk/upload/files/bewipaveb.pdfIn PDF document text
    • https://irrisyst.eu/files/file/vovibab.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/3128506780.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/47779820296.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/57e9622265c75cf52bb89ace1080beea/tixudavazapufafobewoj.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/36079708312.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/juzekafala.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614918a0b3d97---13538300489.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/68942614231.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613939d29c9e8---kuzato.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/fufututiwixajolerikux.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/61245954266.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/m21oh9kn6tc43do5k1l63inlah/buberososovafot.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132af5726735---vavojopotirebesim.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A9 21384 bytes
SHA-256: ffc6e78e037057d2977093369139074e31225628611dc7ad3a817fcb9b341774
font_01_sfnt_off0000fea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA6 10884 bytes
SHA-256: b01605c393c4f66e4142cc32e8727046eeb98b2a14e0b11ddaea4376308cffdb
font_02_sfnt_off000117a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB5 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34

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