Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1dab268c6b15ff0…

MALICIOUS

PDF

43.8 KB Created: 2020-10-18 06:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf9116e8f770f1d14fb005a05aafdb92 SHA-1: 4a6c397080e1282c0dcb186e017fdec2fe412d7d SHA-256: b1dab268c6b15ff038dad568f2c0c52014a47a53535b16e1189d1819faa9f1f6
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://gettraff.ru/strik?keyword=the+charisma+myth+pdf In PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/c2e56.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/1640064.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/gexenop.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/1e4519a832a65bf.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/pufapixid_junegenalatow_gunalavutijo_jifagon.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/babesipaxuvujemefuxa.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/2526648.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/ganepon-fadogi-nerere-dusij.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/wubami-pikijetosili-lebopoba.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/2a5d147a59386.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aacd540-12ca-45a4-95c4-6aba1a88c9d4/sorprendida_monja_en_llamas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b85393-1e25-441c-83b2-9eb72682526f/94637823434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53270788-76d2-406f-be5c-3e23675be8eb/fejufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5508d064-daea-4da5-8b67-38b9b5551c3c/nujizufuxuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe303f2-8e5c-41df-b03f-d386522dcaff/dakexakozoxebitogak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0cd481-5edb-49fd-946d-be8829e24877/60274222690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e980390-f8b1-4441-9620-70e06fbf6127/98468283083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9260/9686/files/springfield_illinois_weather_forecast_hourly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/asphalt_xtreme_mod_apk_1.7.4c_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2209/3983/files/wepibuxasedokexukopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8628/9333/files/69876831803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4565/2133/files/ib_extended_essay_guidelines.pdfIn 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_off00007971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7971 5416 bytes
SHA-256: 9a7f03600955562da1ee06e3b9a112af947d2745f61e52823aacc93ee1858a64
font_01_sfnt_off00008bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBF 10120 bytes
SHA-256: aa609088458960aafcf48d20f6e16301339c0d5710941b7dd8e853f73bb42a4f

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