Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c78d8100357be4…

MALICIOUS

PDF

66.9 KB Created: 2021-03-08 03:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 31d3cdf43be170c304541d6324a9359d SHA-1: 03de3ef159969bf1b5bb835051942b62fe86da9b SHA-256: a5c78d8100357be4680a5046cf3f8f5cded2ba781c20268fba2dae8e7e4469a0
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://fokemale.ru/wix?keyword=ua+court+st+cinema PDF link annotation
    • http://wasegulom.mygamesonline.org/ratusawafesiwezurotilob.pdfIn PDF document text
    • https://tojipojewusaw.weebly.com/uploads/1/3/0/8/130814735/7d9a8bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418570/normal_5fc7ab67a4250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469386/normal_5fec66ee96da1.pdfIn PDF document text
    • https://bowefolezoz.weebly.com/uploads/1/3/1/4/131407704/rofasudosasiwet.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/73386111804.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/what_is_a_calderas_volcano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://weforonezanofo.epizy.com/community_services_worksheet.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_e158913a0eda417b9669564cc386f90b.pdf?index=trueIn PDF document text
    • http://zumosupol.epizy.com/how_to_prepare_for_sedation_dentistry.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/english_fonts_pack_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/10934921592.pdfIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_07d5052f62664cdfb66ec609bbf3ea59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/2462819384.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/8866916973.pdfIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_7a52f3c3c7d64a1694f5be376e7f3790.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/what_is_in-_group_solidarity_answers._com.pdfIn PDF document text
    • http://fusiwati.epizy.com/45908507276.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_off0000caf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 4904 bytes
SHA-256: cc7564c0083fdb448201bfb9521ed1cd908d3db12e6ddead340c171b95f6ee2b
font_01_sfnt_off0000db90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB90 10288 bytes
SHA-256: dd8426acc78a19d9145948bf6f6f124f5a6d78db23e4c408623a150c824af47b

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