Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f47bd2dc3d686b3…

MALICIOUS

PDF

81.1 KB Created: 2021-06-26 23:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 496da54403d09e9e7f15b03e1573b745 SHA-1: 694d9001cfbdbb44d2cd11f5e944d9025215a878 SHA-256: 7f47bd2dc3d686b38004f90b3db45ebe7f49f10969f90caed46e24c1ffc25ef7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160740c6d9ee66---fijexijizadumej.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c560605ae35---96141082177.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fde4e24ae5---60766811597.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096abc629c11---18377101659.pdf
    • http://tuzvedo.hu/elemek/file/21777689682.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63a7124d13---89197737422.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210515193751.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/eebd035qhpdbnc0a98nchk6dsq/60694963799.pdf
    • http://www.cerathai.com/image/upload/File/bujiderimemi.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/0d4a5d263c535ea1ba5042978b851338/3962795962.pdf
    • http://abwingsva.com/uploads/files/69601237602.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082f0cf7bdd1---jalopipuguluzukuli.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/0rmfdlsbohc5hat415mruhch91/sonowes.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/80ca072ac39feea0677082ea49274df1/78206748079.pdf
    • http://wabasnb.com/files/fckeditor/file/194335937160bb50df30752.pdf
    • http://cesurmakina.com/userfiles/file/62580847600.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/u5mm4399mltcjr44bhan777vqo/neparupiwimukariwas.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aa63b00b2---biwifadaramosapusagupasi.pdf
    • http://arniestribu.com/campannas/file/44193082148.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/7154c9db0d28578af534201d322cda24/jujuwexax.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9b1f82c3e---10242503837.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dd05f427885f2beca586e6051bb9c3c6/95420937328.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5ec7c0ff5---domiwobegapeferesozabu.pdf
    • http://g-shocktou.com/user_file/file/9124578542.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/n9i3bms9tg3rqfjlpfu4vtku38/87572377534.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=olaf%27s+frozen+adventure+full+movie+download+with+english+subtitles
    • 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_off0000d7c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 16792 bytes
font_01_sfnt_off0000efdc.bin
3df4094a20c6b4f135d591f87bec52ee364207c33fd51df2ec0d26013ea197a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 11312 bytes
font_02_sfnt_off00010a33.bin
3d762fa0740f68a3701d79c9bd8a8cd4f6db83b2673f9c16d30e0f0e996b44c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 16856 bytes