Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c38c9d82f230881…

MALICIOUS

PDF

71.9 KB Created: 2021-02-12 09:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a96e63806666615cbac38fb6d4be4323 SHA-1: 822430decf3eae3b7bf623c2894df04f2d007bd7 SHA-256: 9c38c9d82f2308812e4e31574da4400ebf8b2d64132a60e92ef5776c9073cc8a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=resistance+to+the+vietnam+war+worksheet+answers PDF link annotation
    • http://igbusinessabouthelp.com/53612061208lcsyw.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/dashed_lines_on_my_excel_sheetij5e7.pdfIn PDF document text
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/6938400.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/398395f2c732.pdfIn PDF document text
    • https://sudiseva.weebly.com/uploads/1/3/4/4/134470115/jamudowemumoxefexa.pdfIn PDF document text
    • http://leftoutclub.com/ek_chora_ek_chori_videobv47p.pdfIn PDF document text
    • https://dunabosugetagek.weebly.com/uploads/1/3/4/6/134601841/migipapijivitinu.pdfIn PDF document text
    • https://sixonawujow.weebly.com/uploads/1/3/4/3/134369174/misesovomemule_feranalu_mulinilo.pdfIn PDF document text
    • http://glawerry.online/manual_de_atualizao_monetria_da_justia_federal127my.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/mujemurovoxeg_zawigokazil.pdfIn PDF document text
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/wazobixomowa.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/wibadinavosunom/80267330889.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/xebofuneripafivareba.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/63585328774.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/flower_background_wallpapers_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/photoshop_backgrounds_free.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/wugidukemevekolapiweloka.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/milugepem.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_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 5228 bytes
SHA-256: 9d42f854415e908cf34958acbaaf70bedb1529d26479af00f499858fbfdec7c0
font_01_sfnt_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 10272 bytes
SHA-256: fc289ee45feb458aea12e5a2d928fc72ab0a6e88a5d3f5e12a13b365c4946392

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