Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa2ea32ef392506…

MALICIOUS

PDF

82.5 KB Created: 2021-09-16 01:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: af56f0903c280e7bec0856c090be193a SHA-1: 0c65205fb28fad86cd07eca218c8fc1f5e8de2b4 SHA-256: 6fa2ea32ef3925068c4201c6d0a41f64fc1d06b0ea0b952263f9ee1f11be3770
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=how+to+enable+usb+debugging+mode+on+android+broken+screen PDF link annotation
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/ribudutuxowodalulovif.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410e5ec5e1f---xilaworiva.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/36642524775.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161414ac8c4a9a---69911614392.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/tufozutidem.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/e7cba94174c306e51e614e54062268e7/nujoxisojepe.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/gatomusulenizobujekedowi.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/74335375090.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/gafotuvazofubodijezeri.pdfIn PDF document text
    • https://kiptep.ru/file/zexagenatijofegejaf.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/53488230072.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090309222848.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/zazupolizag.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/39499651498.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/79465870201.pdfIn PDF document text
    • http://ave-france.com/pics/files/bubolavegafa.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/zutemenaz.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/22454758835.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/benerijoxopexufilez.pdfIn PDF document text
    • http://knipia.com/userfiles/file/24493276036.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/gazageve.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210915_140457.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_off0000db65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB65 11124 bytes
SHA-256: abb1755b416cd518166b7c96c06f621f79d80f0edfee985a12ec8246c1143f87
font_01_sfnt_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 18008 bytes
SHA-256: 2ba034ff7768d09c1378e3c861ee6e67819e2961037888669793ce1741ba0b94
font_02_sfnt_off000123a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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