Malicious PDF — malware analysis report

Static analysis result for SHA-256 f868722b4d58ae6b…

MALICIOUS

PDF

98.1 KB Created: 2021-06-27 07:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fca34ba6d5cd311a1fae32beb7ebf230 SHA-1: ed75c5ce5187fb1c6ed33572dae51e2770d2ea96 SHA-256: f868722b4d58ae6bd5647a1b5ade6f29b71d6c5ee9b925f60ce8873e5103ef6c
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites. These sites likely serve as landing pages for phishing attempts or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160755dbbea114---19410655046.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/5b31a7257d334a3a24ec5aff6926b524/vuzuvizagetogajativufafi.pdf
    • http://alemotta.com/resources/original/file/jixor.pdf
    • http://flygarfield.net/userfiles/file/vetinejezedogevulamubeg.pdf
    • http://www.hangmandigital.com/files/file/rawerufolexodol.pdf
    • http://balogmihaly.hu/UserFiles/file/ranalavusovepikofu.pdf
    • http://vds-construct.pl/userfiles/file/17012325080.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160831e59c43e3---risewidewomub.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4ae794030---favofezuzeso.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e932884c---wofasagojozukexulafudis.pdf
    • http://archerelectricsupply.com/userfiles/file/63076845057.pdf
    • https://camping-du-lac-dijon.com/fichiers/lonujododipogenaleb.pdf
    • http://albino-pitti.com/pub_img/file/wileriwudixegalu.pdf
    • https://abugfreemind.com/userfiles/file/87310011428.pdf
    • http://nprofit.hk/userfiles/10186468270.pdf
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/gorupuruzaxeduzajanow.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/1d9704e3bcb1a5b0fb5265832c6e17a5/50433959237.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/59879991749.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc6134b33d---wajopuzupuxodod.pdf
    • http://lmyc.net/clients/875386/File/gedesubowedozejetobu.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/61f50faf5d4233545deb807b73845bad/lukuvobu.pdf
    • http://indecomavo.pl/inc/39531227986.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/83a31ebd1fe3fff2b54d5ec1b401d8bb/migegetedisejuwujede.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bb898a3cc---rinikivanuladulegazuxegaf.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c323bd2a551---tunobefaxemawupewataso.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=witcher+3+blood+and+wine+ciri+visit
    • 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_off00010dde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDE 16792 bytes
font_01_sfnt_off000125f0.bin
64712e905532397459c4061ed27f558a97d55b27ca35562fb6542d41e1bc746d
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F0 30220 bytes
font_02_sfnt_off00015ff9.bin
368cd638ee9e57d8e22e55bd77844bb1c2d9b16cc4e8e653837d7ec04e789fb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF9 10924 bytes