Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c625f045eecb5c…

MALICIOUS

PDF

42.6 KB Created: 2020-11-08 12:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8a5a87e368a9fe90c89ea9178510f3ea SHA-1: ca8ca91d6c25101857341dd4145b615c721d1ddf SHA-256: 60c625f045eecb5c51d2c9cd4962a8a5e4228f5cc33394d4a67ae0fe26d2acbd
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=i+understand+that+reference PDF link annotation
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/redazanifebejowi.pdfIn PDF document text
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/2550332.pdfIn PDF document text
    • https://suranetu.weebly.com/uploads/1/3/4/4/134458043/8252831.pdfIn PDF document text
    • https://gazofifato.weebly.com/uploads/1/3/4/4/134496451/4ef47d3670fed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f98c647577f7.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/9018556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421352/normal_5f991246766cb.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/dinigugaxej/angular_8_tutorial_franais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8be334-6440-4e1b-9f71-f004218ba05d/29696865378.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/cher_dark_lady_album.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/rezurikuxoz.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/75428277543.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/gst_tax_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/collier_county_public_records_search_deeds.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_off0000685d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685D 5012 bytes
SHA-256: ed6b791d2a63e0bfe75e14325cc49e888a2f4abdfe837c8ef3ffb527dbbd29b5
font_01_sfnt_off00007963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7963 10732 bytes
SHA-256: 9ff074c74cbd994d408f39f0b6571ec758bfb640002747a390bf8a8fd54a900b