Malicious PDF — malware analysis report

Static analysis result for SHA-256 047bf951fc2c3b00…

MALICIOUS

PDF

84.7 KB Created: 2021-08-15 23:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8fb0cc91da663fa7837ecdd7f4df575b SHA-1: 8097ebea6a2b6d449b089fbb8545c8fdd50fe642 SHA-256: 047bf951fc2c3b00c52a519f47cfc3c5a8bf6e94aedd08f5b22207e4db0d635b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://marathonblainville.com/userfiles/files/lilikoxonut.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbcc882958e---32324339656.pdf
    • https://kopari.hu/files/file/21448932880.pdf
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/puzawozuposo.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/e859e9eb26f45db34de5793c205ed895/raxizuguvinalarabinat.pdf
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/52413179899.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0s5f282idnefalmhihhsvrf0q0/97365041845.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e202477d401---38868877542.pdf
    • https://adverto.ee/userfiles/file/97034096598.pdf
    • http://painttechvina.com/webroot/img/files/44875259383.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aabc25aaa1a---xerujewuxojaboxa.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a7f51198e46e69c6a02113957359fe3f/38273777007.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a77b965f907---90400809696.pdf
    • http://www.zywawiara.pl/pliki/vamutuxupuwivek.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/2dd8ee051edf27135abe1164488f7fb9/zamidatu.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607125c869f64---79148653685.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c910ac4dba6---tezibumokowe.pdf
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/forexipikodejalovi.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/s61di5hkuhuhdplf44c2vbgfoo/sisamobonimufubijapa.pdf
    • http://www.morrisjones.co.uk/EditorImages/file/94253768614.pdf
    • http://domeinbeverdonk.be/assets/files/file/48800175057.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=what+is+the+best+polygel+nail+kit+to+buy
    • 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_off0000e899.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 16792 bytes
font_01_sfnt_off000100ab.bin
cbe6f0333b2c0e36d3584d25450307270d1fe89582f308c1f3e28303ceffd550
pdf-font-stream PDF embedded font (sfnt) at offset 0x100AB 16596 bytes
font_02_sfnt_off00012bc6.bin
59b4b014d7c379cd22b9736ed87b9c98d3c2d1cee640a6d7c20de1cca3eb47fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC6 10872 bytes