Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a0aa20a08af85c…

MALICIOUS

PDF

73.1 KB Created: 2021-01-22 08:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 3c8d7f5dfdee534c60d9eb3f7539987b SHA-1: 08abcc862fa467dbabdb82300fd0a07eb0c3aaa2 SHA-256: 04a0aa20a08af85cc6728aea1fab1a3263743818a7c5a3cb8c4977ccce9940c7
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/wb?keyword=good%20soap%20for%20soap%20cutting In PDF document text
    • https://cdn.sqhk.co/vujenibolo/ijihihe/food_web_maker_free.pdfIn PDF document text
    • https://gokotaxoka.weebly.com/uploads/1/3/4/1/134109163/popozufepi_rokukowosar.pdfIn PDF document text
    • https://rijijuxika.weebly.com/uploads/1/3/5/3/135346754/5171768.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/hazHzNG/xuborilibodivinudekuxawef.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/if5YlLl/xewonad.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/jevujinowuxepasome.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/jjgddhd/97806418979.pdfIn PDF document text
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/9682276.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/jjhdGjc/bobibujipesorumokef.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ehhmhh2/2709386327.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/jgfwplA/luke_combs_songs_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/TgdmShg/xupefadalagufixi.pdfIn PDF document text
    • https://cdn.sqhk.co/vamapoludi/REigBKi/lozozap.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/4dX2n64/zofepofolusuzimojo.pdfIn PDF document text
    • https://zagavodemutiza.weebly.com/uploads/1/3/0/8/130814258/074990e0da34.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/novifamigot/suntory_holdings_limited_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/51267575346.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/someone_like_you_piano_sheet_music_adele.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_off0000e150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE150 5324 bytes
SHA-256: f4a9ed2dacff9c13f2a8435890deef4a59011c2e8025ab78702a3194c5dfb0b1
font_01_sfnt_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 10488 bytes
SHA-256: a917b72f2ee4560078c6acca76638ec3759b4c8ec470931ef7389baf61f20e3c

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