Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b30a626c13c7a2c…

MALICIOUS

PDF

63.6 KB Created: 2020-11-10 21:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8a08a7a3e1bbf39fab60300a0f6101e3 SHA-1: 9307958bd8eac6717e87edd332a070c92d639c4d SHA-256: 6b30a626c13c7a2cd972ec7ec1e735fe6a4941a39c9ec9f84b9b1262d66cf364
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/strik?keyword=halloween+basketball+legends+y8 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f9aa6123fc09.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/b72205b67282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f9e0002525df.pdfIn PDF document text
    • https://xuvaguwofivopi.weebly.com/uploads/1/3/4/4/134463587/tisupezepimakurir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f8ac78e191a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/wimubib.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/3rd_grade_math_workbook_mcgraw_hill.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/prudential_retirement_log_in_page.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/geometry_textbook_glencoe.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/vekejekuta.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/hsm_musical_script.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/69484408424.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/lefirarevivowomip.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/65286586165.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/nemuputigogaji.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_off0000bac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC0 5452 bytes
SHA-256: 0e537b05efd0ceabfb09ce6369351102c8502827a36f873546457a4035e0e6d3
font_01_sfnt_off0000cd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6E 10544 bytes
SHA-256: a339830afc7f7afc76e6c2ba1aa22804b2159d785b8bcc873c811f39a6c35c01