Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12842c65d49f580…

MALICIOUS

PDF

67.9 KB Created: 2020-11-08 01:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: ea6059abf72fd6b55d689378a70ba167 SHA-1: 401cbd48b45785ffff5a3a0b3d7b543a53b0fb44 SHA-256: a12842c65d49f580500ad595984302ceff08081cd2d743520ce860f896939c23
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=dallas+high+school+pa+address PDF link annotation
    • https://dokoxinizim.weebly.com/uploads/1/3/4/3/134305801/c2d5a75a583f.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/divejuxofepuwori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_5fa14d75040b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f966f3539533.pdfIn PDF document text
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/gufupovixuzasa_pusoxominegubox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5fa7317fda503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8a00b2c443c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f9f372e3d034.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/genedesowul/western_civilization_8th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/73200230213.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/angina_estable_fisiopatologia.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/witchery_minecraft_mod_1.14.4.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/super_mario_sunshine_download_apk.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_off0000c8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FC 5332 bytes
SHA-256: 0bd384c8eca4640848cfb52031dccfa24cd11e60c5a1c45b137a7fdfbd89b8f8
font_01_sfnt_off0000db1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1A 11700 bytes
SHA-256: 394fdc3e05cca33e2a2dfb58d25ab33deb7360c5c630b269c7bda2017f4da572