Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdea4975f7d74fe…

MALICIOUS

PDF

89.7 KB Created: 2021-07-08 09:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 58f91ce848d385acd07964ea4d962048 SHA-1: 70bf930cf04c5cfb16b3ac407bad877bc0729781 SHA-256: 5fdea4975f7d74fe87c8802a29313d73b28604843d30330105db4ccc917acc58
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/90d0642eb71c50198e642d45b2f79816/71615919765.pdf In PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/ea5c3b05c06c0b0d84f5024295877392/fubebotidisoreteseroben.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/bgfhcpsnt8mfjlhcmc2ui1nfqi/tebefujelopoxepisedegodi.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/16778893929.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/bd722b050d0650313c476e63e89afc5f/gugemolukodagolurewew.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/bf6f2c333360eaf1bd499627ec8624b8/zedevufu.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/wimifusafejikalejobogil.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/b434cb4af8006b899ce8ac21cb613235/73505430572.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/soxader.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/c2e2fd6cce010b1aa6ad6ab961f75713/70131723186.pdfIn PDF document text
    • http://renovator.cz/files/file/tijadutojetarowe.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/4905824e02f22451329a2afb15ebf238/11104460614.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/14775458126.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97e54f06ae---tadoda.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7hotkkphsj1l8g3pu736jarie0/90651119521.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/didodenurafikudeke.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/47239541370.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d66d5b60---zejuguberobomuvafezufij.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc88c70fd9---jilopesoxuvivositewobit.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/xiwekoxebuvumakofesida.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/94814672803.pdfIn PDF document text
    • http://abpaluso.com/upload/file/xubadezakobubatakexanavu.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/jujisidowolexulaf.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/30742957375.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/liwigavuwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=puppy+still+hungry+after+eatingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 17136 bytes
SHA-256: b86c10e58955eee95406f6e6324b51d7c8c9cb061aa33abb802203355f0e1b51
font_01_sfnt_off00012730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12730 10732 bytes
SHA-256: f2fe4e917b30f3d6225bbf39d75cedc28164e0454a045ba8f9f747103b9c2fe4
font_02_sfnt_off00013fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1