Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8eb4916cd77c48…

MALICIOUS

PDF

64.2 KB Created: 2021-07-30 01:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5dd9c5efce926416d6c37bf059610663 SHA-1: 87354ea61e60eac7f69f3bb449f4fd4cb1e06572 SHA-256: bf8eb4916cd77c48d83cc5e9e54946d0bce85eaed5211c91bbac89181f8c2bb5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous embedded URLs that redirect to various external websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates these links are hosted on disposable domains, and the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests some are hosted on compromised CMS upload directories. The ClamAV detection and ML classifier further confirm its malicious nature, likely intended for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6720

Heuristics 5

  • 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
  • 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://marinapogon.pl/upload/file/xajorujuvalilogolo.pdf In PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/20981b255b9bf9af85273e1df8203578/mavorof.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827bca6190a---26580731212.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/53965592084.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fba063174---fabotexedat.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/88120855908.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/cc516ed791c9f2558ff5f663f9a15a7b/bikuxenurevitagumopo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/06894f60e0c9f6e6c2c25de631853e19/61864067995.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/juwukitikefopijepodaras.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b42065d168---58126112506.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/91574f1a5dc1541502dea2442d05f0dd/27466210240.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc99a7a01---kozidazomuperedisiguzim.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/gexabavotikozozutome.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/1814495c30871f41db979ae0c3f0ffea/52175658963.pdfIn PDF document text
    • https://carolinevlieghe.fr/images/file/79194463901.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f32869649b---wugorexagosuwubulenat.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/gonurojitipiredezure.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/stp30kqurrkpous5ofuki8k9oa/1163791939.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/79382a5263282eed626bccdf55d04d0b/93813360844.pdfIn PDF document text
    • http://tianfonmm.com/d/files/46982186120.pdfIn PDF document text
    • http://954move.com/clients/4890/File/65216567199.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/0e1c01738c7a4d59916afdf3dda87396/61727976448.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/aohc1c8cn7gs0e9rstfa896ian/56714102373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=recep+ivedik+4+%2B+35+dk+uzun+versiyon+full+izlePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF1 16576 bytes
SHA-256: ef9c2302d15847780e3a53b0f53a14f5155d9dab9db409414e71bebe51f7f306