Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebde0ccb8d6080d…

MALICIOUS

PDF

68.9 KB Created: 2021-09-03 04:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0a7fe150c69114a66b56463a131b5516 SHA-1: 93b7c771ba9d785e81cb47bb32e51be6035c37d8 SHA-256: aebde0ccb8d6080d8f6730a1ca7b18e1063659f28e08e6cd5e8e043416333d44
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Several embedded URLs point to potentially compromised websites or host further malicious PDFs, suggesting a phishing or redirection scheme. The document's structure and embedded links are designed to lure users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://drafthe.ru/uplcv?utm_term=sollevatore+manuale+muletto PDF link annotation
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/kunuxa.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/dikurorana.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/melajetejasegevofo.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/60475873732.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1be0216d54---gixikadiwaf.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/86902991050.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/81162bf608acc02b75521b7a5c751651/28148099496.pdfIn PDF document text
    • http://telektrans.hu/editor_up/vosabedafametakije.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf7f50ecf1---80758403530.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eff740b766fd57f3b5d6fcaae1c61a63/56904153555.pdfIn PDF document text
    • http://camptagola.com/clients/66689/File/44639554059.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac605a52edf---mumadozo.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/32113501276.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/31805580235.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/1f03993225c5e8b2c96439206d127659/gasonogonixajaso.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a03947f3a8a---moxaduguzitapixelu.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/8a5ece9bfad376281e73b2a7d0569147/gekoribawobavo.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607329058a171---77251440009.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/11826693329.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d99d53eaed---wufagurato.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/vukumob.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161219dbde4b90---68738773489.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/21578995574.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071427a92256---danefopopi.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_off0000b2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BB 10248 bytes
SHA-256: 2069477e787f19d4ff5b6655c59c8f8a2b5644573a4569f5f4fb8b6222147456
font_01_sfnt_off0000c9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 14608 bytes
SHA-256: f4a0c94269ae0c7eeedb97ee3857adfa7f2af017aa2f417a030fb0a99087f5cd