Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2f5907c20e462a…

MALICIOUS

PDF

125.2 KB Created: 2021-07-16 17:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ed26770a736d374ebba0a364c265507 SHA-1: 9ff3e0054be5a6cb92b50e581bb58b079e6c549f SHA-256: 8f2f5907c20e462a666babb2c1399129f31b7b654d53cda5dd778b1286b9573a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting domains, suggesting an attempt to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

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://kapelski.pl/userfiles/file/bomemeselavag.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b006649dad5---tutiwi.pdf
    • http://rjbmachinery.com/d/files/98160840962.pdf
    • http://kistours.hu/userfiles/file/17141843892.pdf
    • http://pantryscan.com/123cars/imagefck/file/vajiwinujetabiwumefafone.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609542687154d---80099242454.pdf
    • https://nikosdimos.gr/userfiles/file/zowuvaduvur.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/8cqpd0nvqtvfuc3m01c3tapc69/penazuvipuvapuranibapo.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16071d37fae3d8---49110849055.pdf
    • https://bawwabatrizq.com/userfiles/file/jawerex.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082e76e16d41---mokexadanuxuwenifowenudov.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/e8cf54b13c357b229d787056d99490b2/xekorefilasudokafe.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d93ccc736b6---mawato.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f090d36ca3f6712ddfb28f198b5c782b/wibofe.pdf
    • http://www.bluewhaleline.com/image/upload/File/29765297169.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/f5ukpp1d24li40h8eunuvd68q3/50176999984.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160929054b22db---femubalagorigijeludip.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/4d4a6431781fe87573538ae41bef25fa/34167868509.pdf
    • http://cnmrobotics.com/files/files/72289524958.pdf
    • http://gialtour.it/themes/userfiles//files/53422003454.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608af2d90968d---venegufefid.pdf
    • http://www.jucadent.es/ckfinder/userfiles/files/78189301767.pdf
    • https://valve-toho.com/userfiles/file/66730379363.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/665a0b3b22a499624472ded74b88b75e/22252572684.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16081dc7865c7d---81654903644.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9936b67424---vororanetoxep.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160728d87b4622---jefijokexapuramar.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=wow+how+to+fly+in+draenor
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018591.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18591 16792 bytes
font_01_sfnt_off00019da8.bin
431fc7d6931236c70b395918258d33c9eb1631ecf10e3bd37e89df8e29bb865d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DA8 10476 bytes
font_02_sfnt_off0001b568.bin
3bc4e351df15cffd454608955abb39264717500d4ce1cea4c923c4e9ccef813c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B568 18756 bytes

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