Malicious PDF — malware analysis report

Static analysis result for SHA-256 359c32a0c179d0e9…

MALICIOUS

PDF

49.1 KB Created: 2020-11-05 15:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 66605b001ed3df375ee45feb985bfbad SHA-1: 413deaff4ec5e2c62dc46e284582a3531f6a731b SHA-256: 359c32a0c179d0e9344f4001539b8403b71fc7fe4feb01343122148a49b54b70
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/aws?keyword=the+underground+fat+loss+manual+results PDF link annotation
    • https://sazaxadapu.weebly.com/uploads/1/3/4/3/134330736/sizavi.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/9435421.pdfIn PDF document text
    • https://fegibaja.weebly.com/uploads/1/3/4/3/134305779/zuworufukazavul-rigop-mupinaxivif.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/fejuxi.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/kezupukono.pdfIn PDF document text
    • https://judamuguduvawa.weebly.com/uploads/1/3/4/3/134352100/tepumab-jojetogujaniv-nuzivesonan-bitefunaga.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/midaguvimabof/petty_the_biography_warren_zanes.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/harbor_breeze_santa_ana_ceiling_fan_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/wolomisixelefowa.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/zulakobifiminimuro.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/foam_heads_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/88167188910.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/18599442164.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/academic_vocabulary_in_use_edition_with_answers_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/fractions_part_of_a_whole_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/rail_reservation_form_download.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_off000080d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D4 5268 bytes
SHA-256: 424e0f57879a74189de664ace9d7dc15f16e3e5a4dc383cd536f0530bc557afb
font_01_sfnt_off00009299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9299 10832 bytes
SHA-256: 0af6c5a3fcb9e8e79fcb1995d73a28a3b4f01cb0bd6ebb5fbb35541466774805