Malicious PDF — malware analysis report

Static analysis result for SHA-256 9980deb1d3fa6c8e…

MALICIOUS

PDF

55.2 KB Created: 2020-10-26 00:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e4785adfd56151dbe7237b7fdff3821d SHA-1: ed9094da07d5a87ca73e6fad1728e1da4eff7c47 SHA-256: 9980deb1d3fa6c8ec077bd868212ee4187418b9ae11f97c282c711bad316ed9d
210 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=guia+ceneval+medicina+2020+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f88d99d5a648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5f8c26434af8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f89d6f301f13.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/8130356.pdfIn PDF document text
    • https://madovokego.weebly.com/uploads/1/3/1/4/131409717/xirugeta.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/fewig.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/7261825.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/1e181f83c324.pdfIn PDF document text
    • https://lajanasana.weebly.com/uploads/1/3/4/3/134368101/7484976.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/2821203.pdfIn PDF document text
    • https://bevokelas.weebly.com/uploads/1/3/4/3/134310014/2546234.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/xorifiwusof_poguwar_botugup.pdfIn PDF document text
    • https://kofejadadamutu.weebly.com/uploads/1/3/4/3/134348877/bitikodulanox.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/dodugexunofado_pewumanexis.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/4105253.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009751.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009751.bin)
    • https://s3.amazonaws.com/ladojenefe/berewevamufuvulomenuzuku.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/adobe_premiere_pro_cc_2017_help.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/candle_making_machine_design.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/arthropoda_characteristics.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/68453578740.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/bitevetaxefafupobawa.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/59530033842.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/japamebokepu.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_off00009751.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9751 5392 bytes
SHA-256: bd9c96e7fa70f493603c8bcae7ce6cbceda944b76359eafbdd190b84a7dc246c
font_01_sfnt_off0000a9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A4 11224 bytes
SHA-256: fe14eae3b4138fbb32909644adcbc6f66b12fbf53feb3d03773462761a5b4b39