Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc7387fa4111362…

MALICIOUS

PDF

73.9 KB Created: 2021-09-03 04:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f22dd28d5f1e30c662f9a5a465d7ebba SHA-1: 834043acb0c79e5b9d0f13f9e6f664d7e8dbbb53 SHA-256: 0cc7387fa4111362215189093e8622460c0c33ad4d5688f1fabc5ae45a289559
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://solarhomepage.ch/fckeditor/editor/images/file/loroxilitimelu.pdf In PDF document text
    • http://ychnjl.net/userfiles/files/detunuluv.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/bigitatibuzolutomib.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/30098210171.pdfIn PDF document text
    • https://marosme.ro/hirek/file/71203107562.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a32d8e3e5---towoserijonekigupibano.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/26506217159.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/f5467dcf68bd961ca70195221cf3ccf9/42002385856.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f700c7522---bexuxurofo.pdfIn PDF document text
    • http://judyzscotties.com/clients/1/1f/1f1ef5c9f72ce0e5bea5babf356718c6/File/kelifaxujokegefifaveden.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/47780806152.pdfIn PDF document text
    • http://wawa757.com/uploads/files/54415974388.pdfIn PDF document text
    • http://kgmda.com/upload/files/99899404568.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd10a1128e8---86975392379.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/20542452956.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/26333652246.pdfIn PDF document text
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/4231119000.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c71249b252---xazefu.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f88d26a329---newefa.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/95086711383.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607317253bb33---pizegejitutomoz.pdfIn PDF document text
    • http://119pump.net/d/files/bivibupakanifu.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/tosujubebopime.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/05/file/20210605_070433_187.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/gvkon6dv92b4v9mb4d61ffdvvc/xatobejek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bimanual+examination+during+pregnancyPDF 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_off0000bfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE3 11056 bytes
SHA-256: d03a05c2b6191b5ff7932323c13a0404e52b0ff58af2896bafa23b294a1a7302
font_01_sfnt_off0000d970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 15972 bytes
SHA-256: e87ae2aaffaeb198aba780a3f7a16e7339b1efcb2432b877a0209e698f8002e7

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