Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0c4844fb7d4996…

MALICIOUS

PDF

72.5 KB Created: 2021-02-20 15:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 804a763c267865f93c674202fee2bdb3 SHA-1: e8f27e6fa354c5a631506c49d983bcb721d87fef SHA-256: 7c0c4844fb7d499670dcb9d5ebe0bb5592f29be4a5212bdb67bd504153e5bc52
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=phase+change+worksheet+with+answers PDF link annotation
    • https://tifegoguxefufi.weebly.com/uploads/1/3/1/6/131637953/tusuposisaxamef_wupolufewer_tukuvexitekife.pdfIn PDF document text
    • https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/putim.pdfIn PDF document text
    • http://topplafond.xyz/383207919637jhjl.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/gCfI3ge/eyfs_parent_app.pdfIn PDF document text
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/vosarule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bovuzigaratufob.rf.gd/ketuvoj.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/dobenasuw.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/74163007500.pdfIn PDF document text
    • http://pufaxutunipoja.epizy.com/xuvonusezimuzaniso.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/english_bangla_translation_software.pdfIn PDF document text
    • http://vufeligix.rf.gd/english_kannada_dictionary_application.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/japefajapugore.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/informatica_change_data_capture_oracle.pdfIn PDF document text
    • http://sovuberexizizir.epizy.com/kojariguni.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/90629859815.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/zizufegike.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/dofugitomufedufus.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_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 5188 bytes
SHA-256: 3c4a8b66d5d839575ea2abf4933ef27297efa091dd057cd4f4f8f772dcb6aeb4
font_01_sfnt_off0000f1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D3 10180 bytes
SHA-256: 5b4ed64cafc1f95b54bdbbc3939620d8c1b9bb15cb696c1d6259d7a33ee313dd