Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b56e871a31a00b…

MALICIOUS

PDF

70.0 KB Created: 2020-12-24 02:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: d0c5cf94bca67f2d4ad339d93ede1684 SHA-1: ea9bbebc43127cb67ae2003f0efedf51d03a36b8 SHA-256: a8b56e871a31a00b0c8b09e6a7958c2007ed7aceb15a131212a64f815dc2d37b
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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.
  • 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://traffmen.ru/strik?utm_term=league+of+legends+wild+rift+beta+sign+up In PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/ee777f3c1ce4ed.pdfIn PDF document text
    • https://puwevifu.weebly.com/uploads/1/3/4/4/134465284/e61790.pdfIn PDF document text
    • https://lolijizaw.weebly.com/uploads/1/3/4/4/134461821/1735833.pdfIn PDF document text
    • https://vepiniripalur.weebly.com/uploads/1/3/4/2/134235349/milikelenavo.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/40246418463.pdfIn PDF document text
    • https://jakinazar.weebly.com/uploads/1/3/1/0/131070367/6446120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497110/normal_5faefe7698505.pdfIn PDF document text
    • https://daxexamuve.weebly.com/uploads/1/3/4/4/134446800/pizig_vategegamat.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/indostat_statistical_software_free.pdfIn PDF document text
    • https://xukejexen.weebly.com/uploads/1/3/4/4/134480318/8306717.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/chrome_bar_stools_with_backs.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/2005_ford_f150_transmission_fluid_capacity.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fca91a600028.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/google_partner_badge_guidelines.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000d314.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000d314.bin)
    • https://uploads.strikinglycdn.com/files/4546509e-2e8a-4cc2-89e9-09acca288ce4/21826439686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55eba317-f5b7-4c70-baa5-a886dd062881/python_dictionary_multiple_keys.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 extracted file (font_00_sfnt_off0000d314.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD314 5384 bytes
SHA-256: 4b98d18e506bba066f392f9d8286bb5493aaf966d4eab5b9ee813defda397288
font_01_sfnt_off0000e587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 11012 bytes
SHA-256: 5c2cee23e12603833436227468a4b46a3b86373fd30c09e6e2fca561de274684