Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9eae12e0c798365…

MALICIOUS

PDF

83.7 KB Created: 2021-10-04 20:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 55fcf52f747eb927591d61b3af0c0dfc SHA-1: 24f96607765b42f2758ec50f81746bf15ca19635 SHA-256: f9eae12e0c798365692f638c83bcdfe7499c11a2638245afabe7da37635abb0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, designed to redirect users. The presence of multiple external URIs and a link farm structure strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://clifestyle.net/uploades/userfiles/file/84705024101.pdf In PDF document text
    • https://eurosan.pl/user_images/file/68619479836.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/49265162525.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/31888195921.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ojd93oves51kn46gg0c4m91k07/zezosoxoxoxologaxiv.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/gelegojuka.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/zenike.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/lawewidirirexe.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16145f70966ed7---pedapavitatape.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/buzaxujoj.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/zoxozemakokomixaxezo.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/naxavid.pdfIn PDF document text
    • https://oferta.lt/i/File/zugolebadudegaxobagopopaj.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/80040010783.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/75323926144.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f143485708c17d03514052cd49135370/44472906057.pdfIn PDF document text
    • http://penetrat.ru/files/files/lanifipijuwudewoneso.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/96548077354.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/zezuvurekolusobazoba.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/kapidazipagitederuze.pdfIn PDF document text
    • http://xsteelstock.com/d/files/libewosawuworaza.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/22353952568.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=most+common+side+effects+of+prednisonePDF 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_off0000e085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 18976 bytes
SHA-256: 09462b7feefa80645fd4b109413a5e1d970a11b9c53bcb3d6bf174c447787de8
font_01_sfnt_off0001111b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111B 10564 bytes
SHA-256: 6f2e2383e34e2dbdcd7347b2845ba31cb8d4d20bc09c0bf89de4b19a8bc81438
font_02_sfnt_off0001292f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1