Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea808c29d29020ba…

MALICIOUS

PDF

78.6 KB Created: 2021-08-21 01:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c225be9e2e9bde9d63e7537a6f1e5b85 SHA-1: b6c957b4736d251d15032d399ea5ceab91b61d52 SHA-256: ea808c29d29020bae3c72ca129b5d5a688ef16b289e7057e50066ffc74e2a66b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=connection+games+pictures+with+answers+in+tamil PDF link annotation
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075c7e3bae91---liluzibusuwezoji.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c217a7b7555---videfovo.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/24453855768.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/zejisipurekixofimufipotox.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/zidanefo.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/tpfss2clt7kn4oamjku4s4ghdd/14426210585.pdfIn PDF document text
    • https://thietbiotoviet.com/Images_upload/files/14764030275.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021080417171373499.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/81231303041.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774def62a2e---mepolobifovojata.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1e0956ae4---xanamuti.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/nozulinovelutiwidovi.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096957be6b36---vemenipobuva.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/92185620887.pdfIn PDF document text
    • https://aashianarealty.com/file/48868350958.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210819155510.pdfIn PDF document text
    • http://freetds.net/userfiles/file/xipovunedojirileputo.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53d4e448c9---40911567261.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b245e24b69b---37361487548.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160846e0601dfa---99470212569.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/83029739667.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/161119ad15865a---rosogujagorekokiruwu.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/rorapapesifujekiwerabad.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/nanarosi.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_off0000ced7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED7 16924 bytes
SHA-256: f8ef6323fe40f4bee4f93bdd3526fec316b5cdd75719175596e1fb159f64f7dc
font_01_sfnt_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 11036 bytes
SHA-256: 1f8354d7dab05d16f198168e9eb7a186a2617d76c92aaf5ab977913515cf145d
font_02_sfnt_off00011491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11491 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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