Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d7a140e700bb32…

MALICIOUS

PDF

78.5 KB Created: 2021-06-30 11:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81b5dddab00d91c2c83f80e48a448691 SHA-1: dacf90d476ffd6e4039f28b5c42a87ebbdfd60ef SHA-256: 54d7a140e700bb32c33fdd503cfb9bc1bb36aa786ecc04ad67e3225d694836be
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to host or distribute malicious content. The presence of external URIs and link farm patterns indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac6b8ab18c---90995365426.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a419a743c6fdd0bfa409faf821c2b70c/xaketibujuxiwulo.pdf
    • https://fonixkoncert.hu/upload/file/38216085590.pdf
    • http://mnarch.it/userfiles/files/xoxekiwituto.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160874d0602b6a---29586118524.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/d76c8fe86fa2dbfb5d2d5d604c0ea5bc/wonibisakawaguwas.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710ac8b4380---tekivadino.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607757faccd9b---visagapedawef.pdf
    • http://www.hydro-tg.pro/upload/file/fegude.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086f3177b7d0---vodoxameji.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608f812e32052---sagugebexaku.pdf
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/95473519986.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b275a495d15---81709471463.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/7abffdd8cad3d691dd1551ef09d1d4ff/miwajuzexo.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/f602c4352af7d904e7da9712a7db62df/datofadidagisa.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab166e3ddf---pokezudojosu.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078091b32439---biwevat.pdf
    • https://fablab808.com/nbloom/fckuploads/file/xosaxigiwubisevusifadepuw.pdf
    • http://hondaototanan.com/upload/files/fifakonakomimugerovutive.pdf
    • http://archi1919.com/smlclub-files/file/taxuxusebamuguwenuwewab.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/c0670818c81d918925b6e7511f16d41b/48815993978.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/45pv6e0n12lrto1g9m46r7etq4/kepiwukon.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=drager+x+zone+5000+manual
    • 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_off0000cecb.bin
4226eb6bd28af204d101e9435c6cda6678d6eac301743dd79f533ac30b8b0110
pdf-font-stream PDF embedded font (sfnt) at offset 0xCECB 10612 bytes
font_01_sfnt_off0000e71a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE71A 16792 bytes
font_02_sfnt_off0000ff2c.bin
1a57baf74972906df12584d187458277721b8dfe01682b9fc3089807fc8eb891
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 17080 bytes