Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d4768a6e6a04f2…

MALICIOUS

PDF

81.7 KB Created: 2021-09-22 20:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a0e16cce7aefe3a2d4aa677648d08c35 SHA-1: de2f3a854aef00b47251ce3e5402a26a548f0b1c SHA-256: 07d4768a6e6a04f275ef988b55a4dbc528e0187747474c4388e22185673e9375
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicative of a link farm designed to lure users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://inwebjor.ru/uplcv?utm_term=fire+tv+android+tv+launcher PDF link annotation
    • http://dieta-plus.pl/userfiles/file/fexibixuxidez.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/kaxebizexita.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/jasusimugaliruw.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/magugasipofutog.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/11743415710.pdfIn PDF document text
    • http://ruihuitax.com/files/file/kibaw.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/94543717905.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/rezududiledalapeketa.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614204f6131a8---45427174894.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/vimidad.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/begeto.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/6240e42a8e380f63ba4b6d2a7bad7db4/65921981299.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/53190819652.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/lewigutun.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161467ca526e1c---77556047145.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210909_080B282B02FC9251.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/10509487968.pdfIn PDF document text
    • https://carolinevlieghe.fr/images/file/muzemavupewogoxifabibeto.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/12446444778.pdfIn PDF document text
    • https://durimawar.com/contents/files/wuvaxadu.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/jizusafukumepanibofenaje.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/dukexewumumekixotim.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/rorisovakidagavawivis.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a35135994e---70935210976.pdfIn PDF document text
    • http://beta-rc.com/upload/files/66357814295.pdfIn PDF document text
    • https://highrise.pl/file/40508307058.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_off0000dc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF446 17452 bytes
SHA-256: e808c584e539bc0680d9549574218c99a7cc0cbc541af0198d4d1bb02171099b
font_02_sfnt_off000121a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A6 10444 bytes
SHA-256: 7949e5140d5115d0e2d0c552fa81142a052fd6be563bafbb3f17e0dac4fe2ddb

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