Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b2fd2da5919aa2…

MALICIOUS

PDF

78.4 KB Created: 2021-07-05 02:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dcdc50d71e935765fa3aa03c78a0f547 SHA-1: 26b2ec815c8ced0d41b4184d8eaa5a052ab8f292 SHA-256: 24b2fd2da5919aa2110f0231d7a3f9f17393ce2634d25c5260fe9e3ead7fd657
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing 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 for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the detection results point towards a malicious document payload.

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 https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b7997aaf5---zusur.pdf In PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/rb44c6642iena3gp4o4m8oruf6/64315593652.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b16f08d4323---fijobifulot.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/93637396013.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d77590b2c---papiz.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/51985697249.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/51048048209.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210601060221_5r4sgp.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/5f8bbd1e75e60ddb0589c0bf9e855a4d/dukifusotaduvebemivifowa.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/losisuxuposojemokevubukek.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/dmkrurc0ukn26lmcvfrku0v8lg/famavezewupalimaw.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/84624074150.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/fixonikesoman.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/51075054828.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/tejafolukemexobe.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d1423a7e8---dopavobekaw.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/jivaluboxilepaworetariv.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608558e4f1832---jamewesusipinorokeni.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/37fcf6a838e6c002b13306c8b0d12aad/84205997830.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/womolipe.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/mujonugaw.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/vikinajirup.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82925f9ae---41187188187.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/44149773549.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=50+ml+into+inchesPDF 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_off0000d0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C4 16908 bytes
SHA-256: 07584e242946109a0b91e389d650770ae82b8e0b6c6262764540a47c8aa4e007
font_01_sfnt_off0000fd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD00 10392 bytes
SHA-256: 426873f32777e6266961831a7d0665fbba81c42adced29add7a62d81227c368b
font_02_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1