Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ab418d69405660…

MALICIOUS

PDF

90.6 KB Created: 2021-07-31 09:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: a4f6c61b9b4b5360fab9d5e63cf96d4f SHA-1: 7f6c19fc4fa81b2e6526f720cd3f97e54531a1e4 SHA-256: 10ab418d694056604523ddc237d0278a78a92425b8b2933461514f81609dada4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://queure.ru/uplcv?utm_term=la+divina+comedia+resumen+el+infierno PDF link annotation
    • https://airflow-skateboards.com/upload/file/petuxazujisesadegaran.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/pozukokufilot.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/xagit.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/monubawe.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c917c16e71a---75685952682.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/34978740402.pdfIn PDF document text
    • http://iltorg.ru/upload/file/bepitazunudatiluva.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/bixaboputinurisegufopeza.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e2ae39edf---22953474771.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608e98fdbf39a---kedufamerexitaxefelo.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/53923612405.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cf181870e0c---dogunizagatuniwitumaborol.pdfIn PDF document text
    • http://sung1.com/upload/files/79655777259.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1a58ac52135d3f38f918882627ed3e13/batigeralovikijejatawe.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/4157871216.pdfIn PDF document text
    • http://adveotec.com/img/file/xasemuzularu.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/5846411154.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d71b097ed0f607ccaf6fd89c8a05a72d/zowovituvojisofawivoxi.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/zemitefezagivamigum.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/75471182311.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/fenexo.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/bodowaju.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1752c5878---67726251831.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/vimagapakakubewekifego.pdfIn PDF document text
    • https://synersys.fr/contenu/file/63727308470.pdfIn PDF document text
    • 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_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 10660 bytes
SHA-256: 111533ec2fe161c5b009c1216be29ffb41331b652bd513fe9761579377252382
font_01_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C04 18028 bytes
SHA-256: e998fd53ce7578cb37e17a4df1fbc079db1b5aedce0332b14b44b75e0fe10fd8

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