Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a366ce19ac82a3…

MALICIOUS

PDF

89.3 KB Created: 2021-08-01 07:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 28370a5dc79ec59fe7d1d3e6dfed334a SHA-1: 12ca93fb1b9e2500edde17421a5b2b8cdc9b4d28 SHA-256: f2a366ce19ac82a326b12f891bd7a1647cc0f13db559d3469f9a0da48eb9a02f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites, likely for phishing or malware distribution. While no scripts were directly extracted, the nature of the links and the PDF format suggest potential exploitation of vulnerabilities or social engineering to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://299-45.com/CKEdit/upload/files/98745321464.pdf In PDF document text
    • http://engroupe.ca/aym_image/files/bosikifuwapelewo.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081de2174425---3383797931.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ed98fa7c24a7e8fa25b17342b9904ed9/bulirasad.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ac7ec64f2---jiserujetodaxasenam.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/77573562339.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/030824282727.pdfIn PDF document text
    • http://esteel.my/userfiles/file/puxokazimevifomuvakuze.pdfIn PDF document text
    • http://fittbike.hu/files/file/54045171893.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d04be76f40---jipazirasatezovexoparej.pdfIn PDF document text
    • http://haverfordhigh77.com/clients/e/e7/e7c5a96ea35a64a1345a575153f12e7e/File/kojugumuguwam.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/18859432179.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098ac40ec3d0---45140444403.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced86211d0b---xobek.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9167527cc---78393690245.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/5ef51dc00c9261f84372d446865b3154/limorozagilo.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/jh452igtpvgqsbos8c896sot31/negobadenosesuvaxu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844745bc44c---xejedogepuvefaw.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/madafonuvizebozu.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/go5mp6iu2tn2271cjc4265g01d/5055905871.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/26943916536.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/41671039973.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ild4rl53b1fffpjjeog8l6fpl6/figigomofarotodojonojagar.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/51468961655.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8d94cf8ff---winoravivedekajakefexowif.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944f5fd410e---59759988657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+reset+hunter+thermostatPDF 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_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 17220 bytes
SHA-256: aaca26ab0b4531c4fddc0e86269e5fbce3e5b4261efe415b861b3dbe13a6e7f6
font_01_sfnt_off000127dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DD 10412 bytes
SHA-256: 776098c6be2d8ad9bf60636aecf8a80e10d3761d6d10e3fa87395b01cd14c92f
font_02_sfnt_off00013f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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