Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19eb8ded3ebebe9…

MALICIOUS

PDF

88.1 KB Created: 2021-06-28 01:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17dbcfcbd2cc84f1da1e71fca489b162 SHA-1: 70b4030e9c7c8392eea44e3cdef19e8d02794950 SHA-256: a19eb8ded3ebebe953035fa7133b09231a34a8ec88785eef006e4674d92f7175
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The PDF itself does not contain readable content, but the structure and embedded links strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/jaa9g6qg7vu0viej1d8fsrhkmi/51430853018.pdf
    • https://medius.sk/userfiles/file/vuvugixejupeboxamolapidab.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/a60870c3bdf9c537836527e097baec90/gowisubaxem.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c008532628f---29056854049.pdf
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/d84d01ec021511df1101b5536d20cce9/17284301761.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16086184e41664---pamovavarewozuvovilo.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/l5pds3lvdsb5e9c12uhsk5t30l/42577163395.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/11757377839.pdf
    • http://nedirajtebosnu.net/userfiles/file/42846100865.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/a1bdlggb0r58nlcg38iif853if/29634283326.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/h92mdaf0t2cdsnb04rh713tis4/18539402756.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/v8uqjti7vqerku1uo09i8jdep7/52617295548.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8f1daf2121c6eca894c89b48a6124d8b/tijofopakodiwelixodok.pdf
    • http://ettermanenterprises.com/ckfinder/userfiles/files/mopububogokubulitewod.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/cba41c56b68f221185a5dc769ec069c2/zosobubamo.pdf
    • https://hgb.se/filer/file/mafunujuzokomisumopibome.pdf
    • https://carparts-fixture.com/file/file/86406069308.pdf
    • https://aimara-bg.com/userfiles/file/getot.pdf
    • http://kledingindex.nl/images/uploads/bivaburovobudoxawu.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/e5iaefj5tj057o8s6h86enli6c/7146791318.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/26c247f59e32409b91e8f8afe5c50b1b/siwuji.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/942a07e88382ee5bb0ffed2e111e2fbd/kuxafomisiwixen.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/34c654ad6659870e9aa6eb76bb1395a5/kuxawazamekuranov.pdf
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/75523778967.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/fe819242fc7fcaa3cdc110e62bb6052b/lemetudakumipal.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=apple+iphone+4s+instructions+manual
    • 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_off0000e439.bin
fc1edca3612235a5db3fd5e42132ef933728ba2f6c3a0d33b6ada43c7ce63c66
pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 24336 bytes
font_01_sfnt_off0001200d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1200D 16792 bytes
font_02_sfnt_off00013824.bin
02fcf9073e1f9741f76a05111e27de8313d26d8cdb5ccdea6a8e2fe457c11cf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13824 10800 bytes