Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6d5f36492e14f1…

MALICIOUS

PDF

94.8 KB Created: 2021-09-03 10:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f9c4d90cbdea26b43aa71af08cc203cf SHA-1: dedd7d75d41221b7bdf4b895e2093cdec4d8d1a0 SHA-256: 7c6d5f36492e14f1172712f836a744aea565e41d44f8b8cc165784919d6a5454
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://amctop.com/board_data/editor_img/file/202105301427.pdf In PDF document text
    • https://glaze-metalart.com/upload/files/zawakuzudavusomuruzulavi.pdfIn PDF document text
    • http://akademibt.com/resimler/files/62733926170.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efe5ce6e89e---30335967201.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/tudutufapamifogisunijiles.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/8kk89s2701b1nim7ks8fukom24/fibabedugalapovi.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/kohue2q69auvuqvvo051hoc0aq/nidogenibegixa.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/zisexugasawekuredafu.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/zavobegufijel.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/velapukuzafobilat.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/3536146851.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/5222112fb9d4e8c1dde9f5b3d85c1443/11128981503.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/57d2abe3edd5f291b307849964314b79/1521564760.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/91613496835.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/nurulepiwivasozunutufila.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/1549f013e70a4ff1655f11d34dd81189/fumuze.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/e29d098be923cf1f0e599fed279e7a55/57202140789.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/d38abe4aebd7cf594beb7b0f1ee044dc/zalusuj.pdfIn PDF document text
    • https://mgc.to/sites//web/upload/files/rumij.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/f51c01c065d31c8997403f2f08458cfb/76179900903.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/gai3j8ijpavcg90sp77h4kpi52/zopewibadi.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9760a1af35fa7ac408b3edc8803e5674/wolod.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/tetifoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=kg+to+lbs+table%2Fchart+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 19548 bytes
SHA-256: f83af2ac6f489fef5d6a9b1e4cf081a4c51723495667d1e04a47e24a23611a8e
font_01_sfnt_off00013c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C69 10868 bytes
SHA-256: 4d7d53ecde19965b02e2e0d2098863392f48b616832223b2dd21d997a93f1c11
font_02_sfnt_off00015555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15555 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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