Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb007c7ef6bbb0a…

MALICIOUS

PDF

42.6 KB Created: 2020-11-09 06:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0bfd8a9701cc64698a854dff83999793 SHA-1: dcf854343f7b0cedcc6d2070b60e01e7289d7463 SHA-256: 7fb007c7ef6bbb0af94f5309376c882793f58fc72081153f4376919a32f51d93
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://trafffe.ru/aws?keyword=st+mary+s+cemetery PDF link annotation
    • https://gepubife.weebly.com/uploads/1/3/4/3/134315704/jujidajanemufew-mezojowate-ruxozexovejili-fenejob.pdfIn PDF document text
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/120455.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/9177866.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/labijeka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dopukomewudu.files.wordpress.com/2020/11/55576741329.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/90900351117.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/29610583392.pdfIn PDF document text
    • https://faxikivekel.files.wordpress.com/2020/11/24957382017.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/garfielf_guide_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/24651952954.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/60719994425.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/noxawenijuxijetulatirim.pdfIn PDF document text
    • https://saxofenofam.files.wordpress.com/2020/11/mujeres_abotonadas_con_perros.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_off000067d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D7 5120 bytes
SHA-256: 1c86204c6fb15caa72cb818c50878eaad00137660e69ee657e3476aea2ae06c3
font_01_sfnt_off0000792a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792A 10844 bytes
SHA-256: b5c5a1231a2939cd52d27b2ba8f891cd7f0b8c2cda98b511fada609594889812