Malicious PDF — malware analysis report

Static analysis result for SHA-256 207302f9df57c9c0…

MALICIOUS

PDF

46.1 KB Created: 2020-11-07 05:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 7e417377838dd1ee7d1779c8f036a193 SHA-1: a51f82bcd956685549b59d75275e1749d052a8c6 SHA-256: 207302f9df57c9c087a938c35e9b142183b9430d618fc27e208aca94c4f608ad
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://traffine.ru/aws?keyword=proloquo2go+manual+version+6.1.1 In PDF document text
    • https://xixunogada.weebly.com/uploads/1/3/4/3/134343035/4777336.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/3741111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5f8f365a992b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_5fa38467d8fc1.pdfIn PDF document text
    • https://zirasave.weebly.com/uploads/1/3/4/0/134096010/5243668.pdfIn PDF document text
    • https://rilokudewagozem.weebly.com/uploads/1/3/4/5/134597993/naloti-puwumowupizunob-giretu-vusubogaruru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f97382e372a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5f8f4d3da44aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f88bc0615778.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/lewuli/turning_point_of_world_war_2.pdfIn PDF document text
    • https://ludoparij.files.wordpress.com/2020/11/the_andromeda_strain.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/52007363621.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_off00007161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7161 5564 bytes
SHA-256: 505c3ccbd5cdb9171d10a000419c8b234d3f1930c57af899e734070a802f888e
font_01_sfnt_off00008445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8445 11684 bytes
SHA-256: 87eca169ca2a820c9a511f0b0a5a8d39db08abcbe8daf91d18303bc12bba8850