Malicious PDF — malware analysis report

Static analysis result for SHA-256 76676006c58a53d0…

MALICIOUS

PDF

69.7 KB Created: 2021-02-20 18:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fa90323520b6313fbbdca2109ae3bcae SHA-1: 2d229adda868db8ae6078e54119e53e3f08321d0 SHA-256: 76676006c58a53d025206786c4b2be5de058a5622d3b07e7525fdcd81a9e72a3
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://maypoin.ru/wix?keyword=wave+characteristics+worksheet+answers PDF link annotation
    • https://vimedijo.weebly.com/uploads/1/3/1/6/131606629/tovasow_sozodetigoneni_modemikuruxasev.pdfIn PDF document text
    • https://zoxusikajikad.weebly.com/uploads/1/3/4/8/134851315/9385461.pdfIn PDF document text
    • https://kutobuxuvesoga.weebly.com/uploads/1/3/0/7/130740510/5ed44a21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388062/normal_5ff5411391065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460045/normal_5fc641003f68c.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/f8AFphh/human_resource_management_system_project_report.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/Usjabdh/zesakutugesanu.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/tP6jhCb/candy_crush_soda_saga_for_pc_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/Q8jg9ji/17515976040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5fe7667274f30.pdfIn PDF document text
    • https://cdn.sqhk.co/gobavata/Rnic4if/turn_off_voice_assistant_samsung_tablet.pdfIn PDF document text
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/11926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473445/normal_5fcd3c2cb2781.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/robumuduluwise/danapimodidifejovulin.pdfIn PDF document text
    • http://xewenofos.epizy.com/audyt_energetyczny_domu.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/html_all_tags.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/invitation_to_an_event_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/33273154092.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_off0000d52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52E 5084 bytes
SHA-256: 42451540c24290f20cd48b466c4d5efcb63b6adf6efe66dcb57dbd84f64baba7
font_01_sfnt_off0000e690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 10156 bytes
SHA-256: 5533e664067e52206d1a0bd35533d1a5e6a7f482473c8e6dab2868dde771f5ad

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