Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f865e6336da3083…

MALICIOUS

PDF

47.0 KB Created: 2020-10-03 05:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7e83b6d9c89718e72d818aa1d4870001 SHA-1: ff188a056a65206af11b0542575b892f5cfe3cf9 SHA-256: 1f865e6336da30837fa1ccc67e7c2db2005e6bbb858d5075648f77eafbaa2912
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cctraff.ru/strik?keyword=download+express+vpn+full+with+key+2 In PDF document text
    • http://files.arrowleisure.co.uk/uploads/1/3/0/7/130739648/nedob.pdfIn PDF document text
    • http://files.jokerjitsu13.com/uploads/1/3/0/9/130969655/3267800.pdfIn PDF document text
    • http://files.region15daylily.org/uploads/1/3/0/8/130814393/pojawib_fusesegawog_nesasamepomav_buvefilatid.pdfIn PDF document text
    • http://files.nscwritingcenter.com/uploads/1/3/1/4/131453496/digupafu_luleze_zegapegos.pdfIn PDF document text
    • http://biwoxariv.mhes-ses-bandstrings.com/uploads/1/3/0/7/130776132/83f9b973bfd75e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/dna_replication_worksheet_21_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/gipefenoxawitelagokiwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0382/9657/files/zisul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560f76de-3605-420e-acb7-265d30eed706/91192706524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d211d7bc-b10e-4043-b0f6-614669061223/rurup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6840cee-ef20-4be7-b312-d7d603cbb417/kabazefizut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067777a9-14a8-4d7b-9abb-60f0e444efc9/384674713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe2284b-3bf7-42a1-b8c5-19247f334dc7/17319413196.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 5648 bytes
SHA-256: bf497f1d2762a0959b6191aa3fa3fae6b7477342d1ec3127637ee6d0ab34e379
font_01_sfnt_off00008b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8E 10528 bytes
SHA-256: 205d4c12c7028b384178f9a75c864d3b1e11e168c3cd184532cb5166b9d4d981

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