Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0ac6f8c37184e4…

MALICIOUS

PDF

174.8 KB Created: 2021-06-30 02:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c0f61a982bebe72c1e13eddb6dffa946 SHA-1: 02851f3b72285dbfa0ca9491a577776911900f7f SHA-256: 7f0ac6f8c37184e4fe5c3634399e0fc25fe49914d7042029e17afcf26b661879
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress uploads, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdbc92a6b9---tavusazoliwu.pdf In PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f05bf990a8---radof.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/gqheuedelm49pne7o5cl0m0fv3/wujurew.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2270536d7---31223230022.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072309fd6f90---3447945523.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/bifexazufexerivexuvef.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/96133016102795d4fce5b6c77c04fc0d/55715757067.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/7mbthavkao0gf6tipbu3a5gp85/58461991293.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/38565119830.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/3vrcm5bbt51vim76mnag6rmtsf/lafofusefaxewojapufexisab.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/72643954670.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3ba3d936---puxel.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/jlo38b9c96aenakov0d4gg3hur/4580304087.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/2lkkn3eai4p0ktcc926fq3ipfb/52606945167.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7812ecfab130dad81f2eb56809b1ca17/86837778013.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/panikigukasexovokis.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/36342f476fff70b442c0792c9fde80fa/11684624326.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/hian4bjbq91m4s2013s6dfj3l4/64998238831.pdfIn PDF document text
    • http://varanini.pl/userfiles/file/xafosodosedemamekaj.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/funiwejaxufazoju.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607016fe78e7d---46118988330.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/61a78709f7b5eb102aceefcd797febaa/71315641184.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/f7sp41pm9flhlfq0f5un2j0sok/28413831146.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/c42bf5f44bffd9ecd5adf56a7fec8af8/ziwikemoxisibemakavuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=be+slow+to+speak+slow+to+angerPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21FCB 10564 bytes
SHA-256: bac650da88ddb75bd30a7fe61b7d5737bd91c868d4795d2f54a769ba19fddebc
font_01_sfnt_off00023834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23834 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00025046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25046 32616 bytes
SHA-256: 02529caf9fd70cf7ab238a2e1689bd313ea19eba0e2a5a52a28b77bc6ac34609
font_03_sfnt_off000294e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x294E5 16796 bytes
SHA-256: eb31b1f96803aefd847a9d4dfc486698f0b9ec626cacefc6678dfc3602289f72

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