Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49d74e0616840cd…

MALICIOUS

PDF

70.5 KB Created: 2021-09-04 05:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 390fc3e0d75db1393748b82a992a09de SHA-1: dfb5edc60229b4780a4cf57385ea8e7643738a32 SHA-256: a49d74e0616840cd305390e846973af62a75188cc58d25e5ac9bb45b14c141d7
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://bliznacite.com/files/29122817477.pdf In PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c2cab9552---muzatowotidonaxopuwe.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/65127240267.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0024d87e05---sujun.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/juxijimebakelisadedaru.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b383dad51eb---95518875189.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace3e2199e8---gotako.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/b0c64f479d73f03da025242c550ecb81/92828430721.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/2078967403.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/gutexudemasajip.pdfIn PDF document text
    • http://stevis.cz/files/file/kepamaguxevup.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/91241633626.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/77620951134.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607e109eaf6a9---tufovojugerimus.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/nenewuzagelitamaf.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/747d66b0b97722f0227da3bb212d0421/28543799870.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ksc7ed7ni7gbhvsp1r0t2t1i1c/bogosikufifoxoduzinipitif.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/wakiramatulunob.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f639cf587efe2a4a1c68281de6f0a6d/69406454609.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/worimuwuperavubulinerawav.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/542eaf6eb4b5f1cf7319690b2023031f/65450093980.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca181bf1e10---pelazazipetuxewe.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/folizukozowimaziduguk.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/48429826695.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=brahma+sutra+bhashya+telugu+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C0 11036 bytes
SHA-256: 42cbe17396aee3ba5766c99ddbcca789a2e517accda8eaaf77b7583e70939f00
font_01_sfnt_off0000cd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1B 15484 bytes
SHA-256: 37b88919c3c717da8d8137423ac8f068f39fd29273c160faa2eeeb4b027b2ef2
font_02_sfnt_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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