Malicious PDF — malware analysis report

Static analysis result for SHA-256 0972b5e770eceac4…

MALICIOUS

PDF

72.3 KB Created: 2021-09-08 03:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fd23ea24cf332c4481909b4eda7b5403 SHA-1: 4a51fe8df6f03288ec251cb879f2d19396b7b3d2 SHA-256: 0972b5e770eceac449f31a00d37900afdc60ae5c9677b56d56283876e2ca7c57
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. The primary purpose appears to be redirecting users to external sites, likely for phishing or malware distribution, leveraging compromised WordPress installations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://plswa.com/wp-content/plugins/super-forms/uploads/php/files/6ebabaa0c4dd5d3fe1e4ef673073115e/fojitesad.pdf In PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dca743d5c9---bevejiru.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/popevifugojur.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/salawonowipiditag.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160794ad129be5---zegewulolunaribafed.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/43477154330.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/79978392791.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/semivovivupul.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f240b577e---98666472714.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210714130404.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/47eeccfc6a18a1a013fc4b93a8ccde02/jokelojexomipofodeve.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160946630d310d---gexeremuz.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/0d5rhc3e8iv3np1grerkb2pd5e/balitamaviwiwifixulatop.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/kapem.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b26fe87d6c0---6884417188.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///44487553469.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/wugup.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/3126067307fc085718f9377164dd2240/wixebitama.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/paxit.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/17654682729.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/ripobujiredazikavisesebox.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77324452eb---82263938624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=counting+syllables+worksheet+grade+1PDF 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_off0000b7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C5 11140 bytes
SHA-256: 17f767e074b0228b2f7df8d084d2e6be3deefb9c7f3118af7a66ee658e12457c
font_01_sfnt_off0000d1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 16416 bytes
SHA-256: a1202e2270fdb63a2331f296b1b187b467782172bf807a83967a2a34f3039f55

Open this report in the interactive analyzer, or submit your own file for analysis.