Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2046b9dcae681e…

MALICIOUS

PDF

88.4 KB Created: 2021-08-20 15:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c493149b22c4b1372b68cbf5459c4ec3 SHA-1: a521a7546ffcf6942e1338e92c484725a0a1a26e SHA-256: eb2046b9dcae681e72102dd97f3c383275100c20681aadd3a380943011e82583
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users via phishing or to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://ketchas.ru/uplcv?utm_term=what+are+the+measurements+for+australian+size+12 PDF link annotation
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/40207dcf03f0a7afe03658526641b5f1/80716177946.pdfIn PDF document text
    • http://redactron.com/userfiles/file/17036721240.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/sazubagewomakokis.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/86212251703.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/13782218033.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/19060327584.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/821ae6666e6c16b0c63cb3656bf5e19e/gisuxugukinupodagesa.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c875ecc0d7---nobirimadidalegetafiwokis.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/raluxedovi.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608742c6c097e---geboxotubiledalisekaw.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161043c542a6f5---5390522453.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/pagib.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c9cc70584---sidaruxolenag.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/tuleruzamosafuwujogif.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/juzamonulet.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/05329268fb6f3f5294c18940615a7d82/92941185714.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff9cc774c5---wonugelezogotabutebab.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/33116141210.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6cd5e4359---dorutawa.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/78841482289.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/45b64817fe5f63b0ee82f59343c208d9/dikujefowomesaxali.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be153e09b57---35072230377.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/40768914945.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/6110ac3805b595ca54eee8c1798ff217/givutazunoxa.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/046841659edb8fa3463819a488ac01e1/jexumifamakitik.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_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 10804 bytes
SHA-256: ecebc265fe992d1171675403449fd2699c4112897f97844031f44688ed62bcfd
font_02_sfnt_off00012599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12599 16568 bytes
SHA-256: 33b4034ebc47f646a8c49cecfadce31e05c779bcd4c116a14862b5d95b7d4ad5

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