Malicious PDF — malware analysis report

Static analysis result for SHA-256 297b79ae5007ad3a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-18 15:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5d1e56a3eab332be50397a162c953bdd SHA-1: 3f10a3d3944248636e9485aac80738358e808cfe SHA-256: 297b79ae5007ad3a4a2d542292e63692da3ddf598cb0d10487b12d1a4ed9b9e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external URIs and link farm heuristics, indicating its primary purpose is to redirect users to other sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://klhl.com/userfiles/file/fodalil.pdf In PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/a537e6f6bbf4c6d9e165bdb0d53008b2/tumubowupajajepur.pdfIn PDF document text
    • http://mhzsolutionz.com/userfiles/file/95566304250.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/85049739089.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/30680563300.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/tezavum.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/73af9f95ca6216d3ccddaee2f0494bf0/51600809782.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109052000367774.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d0e7d80cc---mogovadisefo.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210909003005.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/b188d36dadf5b1031709d3729c274cfc/wuladajo.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/70817208309.pdfIn PDF document text
    • http://cissi.it/userfiles/files/bivedotizububevi.pdfIn PDF document text
    • http://boldogelet.hu/media/54418911203.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/zewedarafotagegixebij.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/51502010003.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/2v1ngrtef84rp4ao6cu5hts4o0/89855160583.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/81655506421.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/tagivefudaraze.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424d5654e98---lunipefopupewevovexozav.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/rurivibapawuvepemizuvogi.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/vulizukipazogirepu.pdfIn PDF document text
    • https://begili.com/uploads/image/files/zopexelaribivewejotiwu.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/tulifisube.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/29948540209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=pyidaungsu+font+apkPDF 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_off0000bd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD02 10704 bytes
SHA-256: 115299ca595907df5c5e4b9e75e7d23b0e1dc74593a6102f862e2b823eb17db6
font_01_sfnt_off0000d580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD580 18320 bytes
SHA-256: fd61cbc506fdd159f9639c526dae994cbfdde5e25bca7d41e8f8da19f9cfb7fb
font_02_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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