Malicious PDF — malware analysis report

Static analysis result for SHA-256 1858b4ed68bb8b40…

MALICIOUS

PDF

124.7 KB Created: 2021-07-02 00:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d246d8bf639e087f4769dbf05ee45e19 SHA-1: bfc03ee68891cc4ff9c87081573da0a3df70d30f SHA-256: 1858b4ed68bb8b407664332344a3b664bdd98a17925edba9cdd28b6ed5787368
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure suggests the PDF's primary function is to redirect users through these compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bffddf16bdb---72684176054.pdf In PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/zovokonugikowabup.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/8c37f69d4a84b2691ad4844f1ab21ed4/zelabopitajelunilukokep.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/zoletutuvupa.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/424e390fb1f77f7a494e4525c26fa3ee/56967404755.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/bipuginagikeverojewomu.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/f5ea97f86bc227d0bcefe886c9a83fe8/nawotumavulegomejus.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/xadivavawatagebukunon.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/6ede401ca0b8e75519966711d29e27b5/42302235521.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daa2456921b---8237340778.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/50485842807.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cbabaa280---nalakuludufifivuwirezo.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/af2f67b4c812040a91f935b72a531489/pukerupenalolinewexupo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b741b07e---jonotawovaniz.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/47277930955.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ulhtqgtjje1tpboi60nifdcmh2/nabuwikepivokovupagefa.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/f785b524e526c042ad9ff6adca8860a4/funukulezeweke.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/73371702444.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a834ae30e0---dotogaxu.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd68285c6e4---wupugunejarexerovofok.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802895f1f65---82256934563.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/ee48783a00877839fcd55e29222692af/79299888768.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=s+chand+solutions+for+class+10+chemistryPDF 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_off00018356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18356 17516 bytes
SHA-256: 874b0b27cbeeb273b4858fa8516a428c2b679b82c60fd3e72f41ed2c99df3786
font_01_sfnt_off0001b11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B11D 11204 bytes
SHA-256: e81dd3b3f254d6961275333e44f83fd5c16963d906ebdf0de96ff48cad4c90a8
font_02_sfnt_off0001cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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