Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ba98a68dbd5eb8…

MALICIOUS

PDF

68.5 KB Created: 2021-06-10 13:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d4d73b7a16051d355dc065d1bdd860e1 SHA-1: cdcdeb24436f41cb3cf9e096a356f76c4be8666a SHA-256: 30ba98a68dbd5eb8eed2d118ee1101eac027471cd60275b0d32a41482bfddbac
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/pbw?utm_term=logo+quiz+b PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412408/normal_5fe2690e83960.pdfIn PDF document text
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/jolikunu_vovenonixegego_fopanoju.pdfIn PDF document text
    • https://lobalose.weebly.com/uploads/1/3/6/0/136089755/kobolo-vanewux.pdfIn PDF document text
    • https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/datax_mobokalizij_dorowavixuvosod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_605a4fdf2ad07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408323/normal_605da76dd4b79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://legesir.pbworks.com/f/konitogu.pdfIn PDF document text
    • http://gopidam.pbworks.com/f/sagadonisizokemu.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/77324227122.pdfIn PDF document text
    • http://togusan.pbworks.com/f/10_disadvantages_of_genetically_modified_organisms.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144779589/24975411845.pdfIn PDF document text
    • http://ravaxes.pbworks.com/f/77559628608.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144413997/can_you_cook_stuffed_chicken_breast_on_the_grill.pdfIn PDF document text
    • http://vananizi.pbworks.com/f/jusumegulef.pdfIn PDF document text
    • http://lexibitite.pbworks.com/w/file/fetch/144550737/reading_comprehension_worksheets_for_5th_grade.pdfIn PDF document text
    • http://xugilip.pbworks.com/f/race_tech_suspension_bible.pdfIn PDF document text
    • http://misabovu.pbworks.com/w/file/fetch/144820824/zelafoxopopezagazifoje.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD185 4596 bytes
SHA-256: a3bddf52dfc23c615c320839b6c6edebe6e6d5bd72b508fe2f5f581d114c7e41
font_01_sfnt_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 10656 bytes
SHA-256: 8cb46214e7549848af024a86e2737fc51c619513c0edaeec32ae8e3f8ad94b18