Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d1a4fe079123db…

MALICIOUS

PDF

91.9 KB Created: 2021-09-04 19:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9fe6e935ff8ab77b155a52fc87926159 SHA-1: 62aa0c83a57e63033c6bff88c49c4df7674359e8 SHA-256: 69d1a4fe079123db92ff59ccbb517485f5abb417389fce44456967ccc306da18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support a campaign aimed at user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130543a1c08c---48677516682.pdf In PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7833602321---mekamop.pdfIn PDF document text
    • http://learningkey.org/userfiles/9669725531.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5552c5d8a---24608977378.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/tutelilazu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608043cc9c344---10012798823.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0d06adaae---29764445885.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/67104985420.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/60144412138.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac06491ec6a---pesanozenozezirovemebeme.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/18640253047.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/49221753842.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/refubezovijev.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/u0mfr8g9qh64m1c2n3d7h3673p/82875292053.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9753b6bc19---sotudusumexenadunidoporaz.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/ludewi.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/podivodejogibazi.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/e8216bd8d53105fdb08126a4ceaa57ab/motudofiwiguwujobinerena.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/4811313004.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/0e9e1e536c2df336dffac04c848c381f/dilutunugekowifexuti.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070382e0aa88---20330645300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+palmer+method+of+business+writing+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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A5 16212 bytes
SHA-256: 6aa336f93ae6f274bcfe998b281e8e3b63c23168c6bc0a7ac523f04bc15111cf
font_01_sfnt_off0000f877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF877 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001108e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108E 11232 bytes
SHA-256: 6e48b774fbe3aa0ae03ecf2d72db79c2b3094c17398fd8a43d01bb3271ea6d06
font_03_sfnt_off00012a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A44 21312 bytes
SHA-256: a4deb18df22176e9024bbe008edb6b4732163368182ffc5b644c0d9d4caa89a2

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