Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6052ee14a78583…

MALICIOUS

PDF

89.0 KB Created: 2021-08-14 21:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d48394aa08e5e53645d25d15b2f456bb SHA-1: 87fe3d83531279a98692740570b69f5054d3e3e4 SHA-256: 5d6052ee14a785837d632de0f2e982a3a94fe4a7aa3eec098ec218db74bb9f41
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ad818cef071---41278190847.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608615fc623db---59803149125.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080c09a42c20---12122561528.pdf
    • http://archidaldegan.eu/userfiles/files/97529422107.pdf
    • http://bensonhigh67.com/clients/55910/File/20162085002.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ba89d07d7---rubifopovefaro.pdf
    • http://studiovalentini.eu/userfiles/files/72334702750.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/fcfe3f9f758eaffffe73683760bc2011/29236016647.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080afda091bb---31014857077.pdf
    • http://gpshardorawal.com/hemkunt/userfiles/file/rovukefanizov.pdf
    • http://chineseclothingonline.net/File/towewatapoboxudumunupem.pdf
    • https://oddluzanie.net/userfiles/file/nodososafo.pdf
    • http://studiosiriosrl.it/userfiles/files/zakid.pdf
    • http://maasmartcity.com/userfiles/file/bitaw.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b07f506fdff---2967082743.pdf
    • http://dolphinegypt.net/userfiles/file/43093299692.pdf
    • http://envisystem.com/upload/userfile/files/95125522701.pdf
    • http://micronforgacsolo.hu/UserFiles/file/34844518224.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f96d196c6---73505828916.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4ee4c757b---jaleridido.pdf
    • http://hotelbellevuepalermo.com/userfiles/files/setarezasipiz.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b39848931---jopabafowopafivogudemate.pdf
    • https://alutat.com/data/file/61316146252.pdf
    • http://sushikyototogo.com/uploads/files/50494323313.pdf
    • http://hotelbellevuepalermo.com/userfiles/files/vumoz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=mortal+kombat+x+mobile+hack+apk+download
    • 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_off0000f6c7.bin
a9d04a2434fca03f7f84d5d33a68e9a6f283e5f232cff8ba17b78b6ba4e0ad8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 17156 bytes
font_01_sfnt_off000123cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x123CC 16792 bytes
font_02_sfnt_off00013be3.bin
831ae1eb2a86963f0cefade244b68689f3be71f3e5ead84f24bde363a0b0fd51
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE3 11024 bytes