Malicious PDF — malware analysis report

Static analysis result for SHA-256 fade20b2a8ff2116…

MALICIOUS

PDF

94.5 KB Created: 2021-08-25 22:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef9945741855e4594876afd3a7036de0 SHA-1: 3cd46f66ac472b4eec01ca369a990d986e75794f SHA-256: fade20b2a8ff2116676b9f31fa3119c6cc3d09ecfa7259d6e122661bc4bef3ff
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a05dcd0be7---roxoduzoditilutebejireni.pdf
    • http://miraesusan.com/ckupload/files/70888333406.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/6894dc463c4d10b63be355beab2db090/nusepavorofi.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/394899bf55dded3c44cd97416f038562/sigefemubamelogekasosi.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861ad897f3e---17455196833.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad782eaf4e0---sojumepi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7e4350d2f5---lujepufuvalexi.pdf
    • http://siripanyalamphun.com/user_img/files/wivipexefude.pdf
    • http://j1medical.com/uploaded/file/mozepuvatis.pdf
    • https://bustotoronto.com/userfiles/file/tomoseluluwebapu.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c40fdbc7e---junavajofidevupa.pdf
    • http://cocoal.com/uploads/file/powavisezufidojegavu.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2889ae40a---83759016065.pdf
    • http://ahxxzx.com/userfiles/202105/file/1985332228.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089485c8884e---37997937433.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7f453db8---tebaxesapovufuva.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b772e8eb74---daruzamima.pdf
    • https://clubberia.com/js/ckfinder/userfiles/files/sifapojupujifowaz.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/cbd4c8cf89c53b19d0dba4164e5d0057/wemawemazofisewisewujem.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e8ec5d7ba---4501743519.pdf
    • https://cleaner.pl/userfiles/file/lebavezomegamasa.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/uuth3eksfst7nr09lq511jbdi1/letorusinizepi.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/idgvir2jleiglbgvurq6g6597j/kavexavik.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/doxikixopepakalumivemuxu.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d5eb9bb278b9b41201bf84cd259cb2bb/fatomokekigapotew.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=you+are+my+weakness+meaning
    • 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_off00010cd0.bin
efdc9d6e66cb009d199ca9f2061b1c0b3a326d9748e20d88bb464f610cedd022
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD0 17756 bytes
font_01_sfnt_off00013b3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3C 16792 bytes
font_02_sfnt_off00015353.bin
976bc882a2304a3ebf074f17c975e0b651733ac158263dc48f02e3bcd1be1209
pdf-font-stream PDF embedded font (sfnt) at offset 0x15353 10684 bytes