Malicious PDF — malware analysis report

Static analysis result for SHA-256 834219a322e1776d…

MALICIOUS

PDF

78.7 KB Created: 2021-02-08 02:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a84dfd3d4d7833f868829b2c2b153b42 SHA-1: 7fe20c92eb304ba3847d3bccf4510cb6b17f4521 SHA-256: 834219a322e1776d43eb78a392db419f702e32729cd1d9be8d579108ca4dda48
202 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.
  • 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
  • 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/wb?keyword=canon%20canoscan%20lide%20220%20flatbed%20scanner%20manual In PDF document text
    • https://cdn.sqhk.co/nebafaveju/ehb89he/ritoriligigadokezujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_6011a7957a08e.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/hfvgiWc/79767415265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444647/normal_5ffab381d1fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5fd2da19b19d0.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/jugdAWp/54815021274.pdfIn PDF document text
    • https://cdn.sqhk.co/ruduligived/hhhgg5F/82244497003.pdfIn PDF document text
    • http://vorecan.space/46871964661gh1oo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fef4c447278d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_600ce7af94a05.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/fgfm8az/62717107414.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/muvarelo/15501158974.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/97122892444.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/92743347598.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/lirik_lagu_bts_answer_love_myself_hangul.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/adverbs_of_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/pegabamogaxejepazodejokin.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/dutudafizepedijusilaweja.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_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 5488 bytes
SHA-256: 12f5aae3a2c24184db5fa65d09703609e105838ad62888380c92db70bd7a863b
font_01_sfnt_off0001099d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099D 10528 bytes
SHA-256: bfb0fba17842e76caaf2ae3792c3e0adbf89fb56b172aa85273c7cd55a8adb75

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