Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c449e244e3df68…

MALICIOUS

PDF

80.0 KB Created: 2021-06-29 01:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42f64db98ff3120488c58cfd1d6f06f3 SHA-1: 1a144afe97be728631785f51be08c67933802c81 SHA-256: d1c449e244e3df6849dc40d5151d226fc764c9badc3f028fdb17cefcb983e84e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL analysis point to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://nousgarage.com/userfiles/file/pubitoraniginugisewovu.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4950cd2d1---95494490120.pdf
    • http://dancedynamicsla.com/clients/38740/File/80629887578.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6276d572c---minutid.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c4ad790ba---fokofemodipumotediwofun.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160bf51db1969e---domutonawan.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608226f5314ba---wulekazexapopukexaro.pdf
    • https://ringid.vn/ckfinder/userfiles/files/96443608116.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d93d80253c---85986274631.pdf
    • http://china-baby-clothes.com/d/files/9175067932.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088669fc5344---bekodutireruxi.pdf
    • http://nmglyxx.com/userfiles/file/rivuwutolodukixal.pdf
    • http://netflor.pl/upload/File/25645940933.pdf
    • http://arebiatours.com/uploads/files/8965300574.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/917f5fa0c6ba43fadd33fa977d6367e5/nusevuxipatopusosibu.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/vjevsi9jskhdvqkmsjdgrnkmlj/katewov.pdf
    • http://somogroup.vn/ckfinder/userfiles/files/16059364226.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/3lvbodsjssau1vga68s8el5q6l/guboparirolekuneke.pdf
    • http://fernandopelosini.it/userfiles/files/59213624156.pdf
    • https://unserbiokorb.ch/userfiles/file/zunovitekegijijenarus.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/bb5f46a0d82a97a4cb2bb62932b565c0/legepadijakixomad.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/27365643597.pdf
    • http://firegallery.ru/img/upload/7772715607.pdf
    • http://bjjiffy.com/upload/bezifilelamufafajelaxedi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=20ft+gp+container+dimensions
    • 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_off0000d4fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FD 16792 bytes
font_01_sfnt_off0000ed0f.bin
2f125eb83978aadc5a70c1d4a4db2dbbfd080ce35c58788d2b23045c8e41b0a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 17056 bytes
font_02_sfnt_off0001192a.bin
341b4298a71d72e52303568899c5a838622b0c3e322398395a9fb2bb0be44287
pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 11064 bytes