Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b179543289cbec6…

MALICIOUS

PDF

42.5 KB Created: 2020-11-05 22:35:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: be54ae5e68979c64e08cbff1b83242e5 SHA-1: acd38f599577aeb4ebc7bc44c2bc49cd259a6229 SHA-256: 9b179543289cbec63ab842152a795080efbc4265ccb6d0c2b3360ec26c679e32
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=school+supply+sales+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f89f43016363.pdfIn PDF document text
    • https://ranenowubugipo.weebly.com/uploads/1/3/4/0/134040983/9180243.pdfIn PDF document text
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/jovani.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/zaxamagiputijor-wesakavul-kewaz.pdfIn PDF document text
    • https://jibudodenip.weebly.com/uploads/1/3/4/3/134364722/42a56da7a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f873c866cbcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000632f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000632f.bin)
    • https://s3.amazonaws.com/gewisetug/kidde_smoke_and_carbon_monoxide_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0dbbda-2a12-43ce-92fb-032ccf3d400b/relic_purses_handbags_website.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/25374045887.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/xisasitujunokisoxoneti.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/smith_and_wesson_model_60_serial_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/argumentative_and_persuasive_essay_examples.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_off0000632f.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 5648 bytes
SHA-256: 93146047cab786c7f5f675c12197f2fe8489cb08f82e018b2c8f5df2b395346b
font_01_sfnt_off00007675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7675 11348 bytes
SHA-256: ed0cd5a578cd54e2aa466a66f5f20fbf930843ec37240e2377347e683009f91b