Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c96d08da741d359…

MALICIOUS

PDF

53.7 KB Created: 2020-11-07 06:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 02031f8f2e51f1828dc850d2dba3f70b SHA-1: 7af595b95a35dfac7f1bcf201584679e247935ae SHA-256: 3c96d08da741d359ff288735dcc18774916bddc413628bba7b465d432a245258
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/123?keyword=icloud+key+unlock+tool+version+1.4+download PDF link annotation
    • https://jowakalol.weebly.com/uploads/1/3/4/4/134480841/1e996.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/1b14c7d2ca1a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f8f528f99e01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f9d2ca8b9871.pdfIn PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/54a531e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca987582-f5cc-4f9a-a339-afc6fd029d20/domisitisubegumulenegag.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/diario_de_vampiros_temporada_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bcd6438-214b-4d85-bcdd-93686e8e804c/sigibuvawuxovategis.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/family_law_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5445d9ec-4a28-4313-a399-b8e73ac15e40/vufazawedupurubevefuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/allen_bradley_powerflex_400_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/manotijupebiror.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/3954715056.pdfIn PDF document text
    • https://farujigorile.files.wordpress.com/2020/11/dezezogavefajivuru.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off000061b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00007298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 5360 bytes
SHA-256: 644c8e260566f7daf5dc6d54049a04f0bb9882f18c0e0cbd90e8703cf5bf7082
font_02_sfnt_off0000850a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850A 1728 bytes
SHA-256: a7921e1f22a3b9f131f1d26e0a30b1579b95f06bc21b675b004e759a1faecb7f
font_03_sfnt_off00008da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA5 11068 bytes
SHA-256: 3aa9bab5f4581c8e2c37d0171c026cf3036aca79d3dbf73ae37abffce4882aca
font_04_sfnt_off0000b356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB356 16144 bytes
SHA-256: c57ff1783e63ed78191ae55bc86cfd1481af7e272a562294c473d018c0a04cc4

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