Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0a2d097f864c82…

MALICIOUS

PDF

65.8 KB Created: 2021-03-02 12:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: db1ed64f41220e05bf5087c2c6dc9892 SHA-1: a91f49fb4b127e0f3553b994bea740f7e2d72946 SHA-256: dc0a2d097f864c827c5e603f86a6a501da28c52faec675366cca5c7d41b25350
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=monroe+65490+cross+reference In PDF document text
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/2219597.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/dokiroxowewomakojo.pdfIn PDF document text
    • https://motuzepiruwilo.weebly.com/uploads/1/3/4/3/134348631/numafuvi-wubuli-bagifaz-bixulag.pdfIn PDF document text
    • https://saduzuwaz.weebly.com/uploads/1/3/4/5/134599146/zojavotetagenivilopi.pdfIn PDF document text
    • https://bijazebis.weebly.com/uploads/1/3/1/3/131382141/renuruzuwe.pdfIn PDF document text
    • https://defupaga.weebly.com/uploads/1/3/2/6/132681490/9818796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesixebejifoz.epizy.com/free_computer_programming_classes_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/bipovetaja.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/penatalaksanaan_atonia_uteri.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/firopekavibegubokopavemof.pdfIn PDF document text
    • http://welidigukiru.epizy.com/r_studio_tutorial_deutsch.pdfIn PDF document text
    • http://jipesofu.rf.gd/4613648433.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/kojidiri.pdfIn PDF document text
    • http://ravesezubepad.epizy.com/azure_sql_database_migration_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/nrp_guidelines_for_chest_compressions.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/67578627158.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_off0000c4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E7 5300 bytes
SHA-256: 9d69c9b6388f906a99d98b75d545d886aa93bd95a28c2bc3e0d9d778f77abf9f
font_01_sfnt_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 10108 bytes
SHA-256: 599cdca911389db238f8622c0ac9eff45d890e8a918094d47b9fbf80d5ac13eb

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