Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa890c7859e0121…

MALICIOUS

PDF

86.1 KB Created: 2021-07-20 12:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9391c451963fdfb2c2f97830359259d4 SHA-1: cfa609db2aa19c01cd6968ca40abc3c9716497d7 SHA-256: 7fa890c7859e0121b3a57ec90dc1bb23ee3a7c4e0b91dbb1b224b35a803c817c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains a link farm hosted on compromised WordPress sites, designed to redirect users through multiple domains. The primary purpose appears to be to obscure the ultimate destination of the malicious payload, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609018f46042d---74072790054.pdf In PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/91310850773.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/bugulowesuke.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607a10ce26092---20964485066.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36961883af---29435995169.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/7987788788.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/domiwirax.pdfIn PDF document text
    • http://aa-nusd.jp/18266917523.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/42ff0sf3ac4oglku7oe3eqsqfn/gijefodajavuvipagikiripi.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/vulupajoperavexawejusokep.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/c2b697c2c0c5a789621620dd0838f987/81355755353.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/38963458898.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/4518f78eb17c767bcecf6d7f60a98d59/zijem.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/zoker.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53086354015.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/7489e4f1dcaa87ca8809524661ce60d2/bukapalabeworewewafexefu.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a2e2a47b---72057617491.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/4918182661.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/65640362519.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/j6j35qf3b7f6sjv10doh6do382/ladegigoruvaforivivij.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160900aa7a5799---13705569802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=home+remedies+for+hypotensionPDF 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_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 16376 bytes
SHA-256: dce56fa8e9c29751210eb337626b483442af755dc8002e3292d00a779ed03277
font_01_sfnt_off00011af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 10660 bytes
SHA-256: a970bb5cffea3b9d94e14bd6f45d0b88e5c44578246793cd25cba3679e9ac4e5
font_02_sfnt_off0001332b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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