Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f01df2f6370290…

MALICIOUS

PDF

85.4 KB Created: 2021-06-25 22:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a06a8fafec62e286a8a02ebd50e64e81 SHA-1: 97fb042de8320bbee0905ec505497fe782bc10fb SHA-256: 55f01df2f6370290bbe14469cd66ab4863ba52500efdae1671d70374c1bd35a5
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites, indicating a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a phishing lure or a mechanism to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/86fae9b322a072c8cf0691917c158d1a/24827165963.pdf
    • http://from.ua/upload/articles/2021/06/18/files/53248624103.pdf
    • http://vasvaripalmuzeum.hu/upload/file/masinurunazoribusupa.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86280dfc6c---karutasejezurisewelof.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b464a909e---24782598958.pdf
    • http://elmbbq.com/uploads/files/vemobibasaroxabo.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a447140a5d---vobapudefot.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/vowusafibodimususelal.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160788da40345c---muvez.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c37d3b25cf---xebubizufovawov.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/4b9d56ea7f76a4742606b2bcc25ec823/81711021389.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989b89826f1---madaxawibejufiposela.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adbd0843566---16953838290.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a72191098---39210291995.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087f7237a4ea---45040049724.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/125da27d1cfe63d3cad8e13076d04157/bozolopu.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609a55ac89cd3---9253044900.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff84c73990---49862526540.pdf
    • http://associatedreclaimed.com/userfiles/files/72815547663.pdf
    • https://cuacuonbentre.com/upload/files/sofonunexawofuwolenu.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9501b6f18b4c48d5e831d07efd31cc30/93678937203.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b662e57781---jijominikawagesojap.pdf
    • https://akproauto.com/nbloom/fckuploads/file/jadefifo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=characteristics+of+computer+system
    • 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_off0000ea2d.bin
c1a039ea4fc543f191fa17b1524a84723471bb313cbe5f6dd609150759d5012e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2D 17380 bytes
font_01_sfnt_off0001175b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1175B 16792 bytes
font_02_sfnt_off00012f72.bin
aaa2601478e6c8cbca73856e7e6368490cd93cfe52c399ed431da4dedd2de430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F72 10840 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.