Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef02d800ed3d7e9…

MALICIOUS

PDF

98.5 KB Created: 2021-09-01 00:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6ec437511ab2e90fd007febbb26737ec SHA-1: 170a7d6846c27c301ff2db7ffc36a554ca431da2 SHA-256: bef02d800ed3d7e96588b6a2444f81898042c34aba39194a67d59837d1a0e5ee
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links pointing to various domains, many of which appear to be compromised or disposable hosting. The primary function seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://barcelonasixtytwo.com/userfiles/file/53453141876.pdf In PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/42185910709.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fuacn9hjmr7bs7e4a02gjk2hc3/83880759902.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47956558825.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/26139174308.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f7efcfc12---17972657457.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/48517853476.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/mg0c6os195p53gjjrdaa28gei0/40543230792.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/61714555214.pdfIn PDF document text
    • http://royalgroup.at/tmp/28958132078.pdfIn PDF document text
    • https://puppometalli.eu/file/17806882142.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/wolifisabano.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/zikodobuwawizilun.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609435ca89c98---duzawuzajupanopinu.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/m66phk43c91ha5f8sq446ie0l1/49240331423.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/23324901651.pdfIn PDF document text
    • http://articolo17.it/siti//usr/foto/files/9801799850.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/sakiraxifi.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/84935768808.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092fa296a40b---bozafipawirabi.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/001eae41a29da31d0bee5a765dc7ab52/sejudelekapumadixedo.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078bebc5980c---97902297687.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/50965848668.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/rudenejozotunebukobozunux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wordsworth+i+wandered+lonely+as+a+cloud+analysisPDF 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_off000118ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CE 18340 bytes
SHA-256: 2537948e8e6851e36088dc249f0b67b64d202918ba477627141971c6c383d9b3
font_01_sfnt_off00014900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14900 10760 bytes
SHA-256: 68b26a5791f01035eb95442a5ade657b3b76b6929fef9cd5d5807ede76894558
font_02_sfnt_off000161ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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