Malicious PDF — malware analysis report

Static analysis result for SHA-256 2514a9582f8a96c1…

MALICIOUS

PDF

50.4 KB Created: 2020-11-08 09:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8d8fc0a198854144a4fdbeb688354299 SHA-1: f6d8e5977906e6919ea341ab6bc79fe81acbc771 SHA-256: 2514a9582f8a96c18b699045e3058744a5c034d167a22d1dab95d299d3a1993d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=unblocked+games+333+at+school PDF link annotation
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/kumibozugadif-wogabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f9bc68210df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_5f98bed64b74b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wisevojinu.files.wordpress.com/2020/11/lababazagijoxixexelufogal.pdfIn PDF document text
    • https://s3.amazonaws.com/zewavidopexebi/crackers_recipe_snack.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/ark_extinction_creatures_spawn_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/historia_derechos_humanos.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/fagaretupanoxuvus.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/brick_bat_coba_waterproofing.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/zujaxosikisofajawoxekij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad29d6a5-3afe-4a16-83f2-0a65318e79af/tidukofaxezasesalu.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/microbial_genetics_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/brushless_dc_motor_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/mupudipuvo/pajevoke.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAD 5616 bytes
SHA-256: 52e7887c32455cb96eeac326182c79ca83f526a8019a8d9e7755de7cc819e006
font_01_sfnt_off00007199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 2056 bytes
SHA-256: a94933165527162c680c816b5377a7ac8ba9404954c548cc3fb50edb1936c6dc
font_02_sfnt_off00007b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B62 10424 bytes
SHA-256: 6c605117b2d805cc4a82ca020fcdc38a65e38673114d42a4108025e9439fdac0
font_03_sfnt_off00009f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F53 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8
font_04_sfnt_off0000b448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB448 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d