Malicious PDF — malware analysis report

Static analysis result for SHA-256 7845218c50a1eb1c…

MALICIOUS

PDF

92.4 KB Created: 2021-09-01 02:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9b023f5ee962b70dfe7733c71d0928e8 SHA-1: fa1a01b9d511788083ad3118d2e5da5871f03c62 SHA-256: 7845218c50a1eb1ccac48bf06e50bc2aba651937684dbe8ea92ab16c71e28a18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://oniceh.ru/uplcv?utm_term=short+french+quotes PDF link annotation
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/79687a9614218e83135d18334a6c0aa4/funitudivorusobowolujegos.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611f0c581e0a3---64102633545.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/cq8thp40477kju99970m1rmn14/72310561524.pdfIn PDF document text
    • http://runo34.ru/attachments/file/48773320028.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/967e3d154126c38746094eeb2772c0b6/50277245940.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/73745646005.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/gf4ronv5kcj3grl3hdtq470lui/17992667889.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/lapekekav.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/lasizelano.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094351ec98d6---goxawovavawepexotitaruvik.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/14f7b9952338cb5890bbb6aa4a8c5db5/vesizulolojidenufodixobi.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/66313545967.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/mrr3b4a61706cqc51rhdc76nt5/bizawexo.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/seluxufuxu.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/80300572003.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/masumiwomijiwum.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609a36f783cf0---84605217793.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c800e72ad---tijemibopalabegogisasa.pdfIn PDF document text
    • http://axwelindia.com/uploads/pomamawililujokires.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/827dd9a84966b74ad21c3ce5622d27f3/rupuvirazi.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bca96dc9f83---97598464870.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a986cf889a7---zarope.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_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 23040 bytes
SHA-256: efab96a9a82bc57f21fbcdf7a2dade73ea0e3bec9195589bad02f467cc9f26bc
font_01_sfnt_off000129fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001420b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420B 1840 bytes
SHA-256: e11639021ae82bc81d66597892112dbefd7f2cb67f426bbebb6fc3c29591e729
font_03_sfnt_off00014ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB3 10456 bytes
SHA-256: 40feeeb121fdcc2fb483d0d6732d042c4de1569c77d152b3807b9f2abfe8e052

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