Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc69122710cfa60e…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 06:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b2a10c68955ebc0551674b37d42581c2 SHA-1: 789bb6da61a82bd6183d7fa8fd0e958351db34e5 SHA-256: cc69122710cfa60e40d832d3dc27fd55cb62acfb12d2ccb174e79976f5719fdc
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. Heuristics indicate these are likely used to redirect users to malicious destinations. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/fe5pdud8c2nre9v6jpv2hd674v/sogixagelaputavipijipi.pdf In PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/27363547687.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/2a8ed4bb67ba045b5e1e287e7a706aa1/mexuvekukiritazuzi.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/gululabuxagomonad.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d43bfd858f---59625853565.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/fcf91efd00ef01e3bad71b9737c9dc2f/87755221285.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/b32baf700eb43e639668c98bb229bf72/97047400691.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/dixuziwiguleb.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/63129146779.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d3dfee5e15e---bibipifidodidogowor.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3a69f387c---9523783499.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/42783526813.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/99216840215.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/benagufi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612638e16165a---55933174817.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/11691280953.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/12090c8e8c938aa13556d96a4c6b85d4/mavip.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/80009851708.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a138d504a90f821393bfcb86abdfd439/liwanavimufawon.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/tuvuxizepapipibegin.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210601012034220.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/rifakutugewusumuza.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/fufofogadosodawafesape.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/suxidafosemuked.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/nuvomimimikerafabesolex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=keloid+adalah+pdfPDF 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_off0000e043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE043 18656 bytes
SHA-256: a8621285f82a4940421c20bf80f99b2f9d9ba1555ee73aa32f8a56c0833f2658
font_01_sfnt_off0001103a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103A 10116 bytes
SHA-256: 63d99b75d285c73fd891a5bedf0a3a59443a53a1c96d2a011acc42f6e583fc6e
font_02_sfnt_off000126dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1