Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6dc2069a31b1835…

MALICIOUS

PDF

98.0 KB Created: 2021-09-16 16:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 234ffb3069d8396a2f17a5636c3fdca5 SHA-1: 7d56f3fcfcce104d8654d1994f1048b00ef76069 SHA-256: e6dc2069a31b1835034e3749a756c9ad986d87f2401d0a72d9074809dba8cc92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external URIs and link farms points to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://t-eamplus.de/web/editor/files/katusenejazalun.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/c7a8998f8bf924542a68d7a9fbb87e68/46096505430.pdf
    • http://orderkiwicafe.com/uploads/files/riwubatuxokisesakesexudi.pdf
    • http://tantusmarina.com/UserFiles/file/jowetidunarewinu.pdf
    • http://travelport.pl/userfiles/file/kuvaj.pdf
    • https://tradingphrases.net/userfiles/files/21593433900.pdf
    • https://kasihpaham.com/contents/files/33111921001.pdf
    • http://redeyeldn.com/userfiles/file/lutamusama.pdf
    • https://himarco.ir/basefile/himarcoir/files/6805603619.pdf
    • https://daulte.com/ckfinder/userfiles/files/70186239242.pdf
    • http://satisfytech.com/ck/upload/files/58523207696.pdf
    • https://anhhuynoithat.com/asset/files/66599995371.pdf
    • http://cungcapbaoduongcuanhatban.com/upload/files/vikuganezo.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d44c17363---81971250624.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e36c27a07d---gawobewavuvixokasemab.pdf
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/jemab.pdf
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/nabavizit.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141b6e48e403---68457808155.pdf
    • http://zhengfutz.com/v15/Upload/file/20219325383487.pdf
    • https://osakaav.com/userfiles/files/76419142649.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/abc52610349d6bb9da51588fb283c3e3/gomalat.pdf
    • https://dla-pracownika.pl/pliki_user/File/30656268860.pdf
    • http://vagtteam.dk/userfiles/Files/lavupaziw.pdf
    • https://i-try.tw/upfile/files/2021/09/07/figikiwojexovaxu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=chinkara+kinnaram+malayalam+mp3+song+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_off0001140f.bin
a754aec2c0f8cb654ae945fe9cd2cce6cac317696737682fed490585693d8f0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1140F 19144 bytes
font_01_sfnt_off0001469c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1469C 16792 bytes
font_02_sfnt_off00015eb3.bin
c9beb5af5554048707080c3929f8e4c1bd9cf9233535234b53818cc20af309f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x15EB3 11104 bytes