Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cfd484a08716b0…

MALICIOUS

PDF

44.2 KB Created: 2020-10-30 20:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e08957770f72b5f0842b5db5e861b585 SHA-1: 84e70f23e945b82b6269d2d6eb521bafe6a01d6f SHA-256: 41cfd484a08716b00dacd3aeab718e454f618587981dd44ab8dfeef356d8836a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://cctraff.ru/aws?keyword=gene+pitney+songs+something%2527s+gotten+hold In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_5f99e5fe9c55d.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/ee1660a3c9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8e087176baa.pdfIn PDF document text
    • https://gixapogaruxa.weebly.com/uploads/1/3/4/3/134331356/f520d1051d75088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_5f97eb8c700a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f87400dbd514.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005eea.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005eea.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off000095e3.bin)
    • https://uploads.strikinglycdn.com/files/24a61a74-3e41-4dab-9ec5-28fccb382054/woposivamojowipux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f00049e-4afb-49cf-a4f0-b8e4d88eab0e/4540135993.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/medical_certificate_for_leave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922e7d4a-7ed8-4a3c-9848-f65aaf0db5bb/95812445489.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/36417030807.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/xusazexodobadafukamuwuvef.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/gejononu.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/sales_analysis_report_example.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_off00005eea.bin)

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 5020 bytes
SHA-256: bf9582c44dc3dbbb886a99cd48e52d720284dfd39a81a59d083255738d91d7c2
font_01_sfnt_off00006feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 11480 bytes
SHA-256: 3f608f6c0de5084c32e34ac1df0110b6250e9aecf3cfc92ac1a95a12ce74f12c
font_02_sfnt_off000095e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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