Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97d0ac379430c35…

MALICIOUS

PDF

86.9 KB Created: 2021-03-18 03:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dc0c73979e3d69e0a1e797966b303e41 SHA-1: 352400b7b2e13730f8700de157622bd8e8a14695 SHA-256: e97d0ac379430c35d87318e7210f23a3d4c4a406b1bbb67c250de99a8c9621f9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/award?keyword=us+high+school+biology+textbook+pdf PDF link annotation
    • http://lagejarejitog.mypressonline.com/12185532396.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoxewijuja/fDid5hj/50598836525.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/rggtxjg/lulefofimakeputip.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/5877211648.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • https://cdn.sqhk.co/lasanamemego/gigjha5/fanenuteluzapin.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/13_reasons_why_season_2_detailed_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hgfjiB8/learn_to_sing_in_tune_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/hIQgeid/lizodozebezituderemeno.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/tedowafomaru/ecommerce_website_templates_html_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/wewerulakavufufu.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/second_variety_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/biomass_briquettes_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cae3187-b046-4da4-b440-92e675f3d734/dd_character_sheet_form_fillable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e5b29f-0aff-4d31-94fb-44c19c8eda64/81143000884.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_59d0b1bf61894a209ac19b1619224e11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/507eedef-1a51-411f-b9f3-4f7252a5f3d6/my_cloud_ex2_ultra_root_password.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_70fa1cdd427a4a83b6ce03eb5577972a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/32402786104.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001132d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132D 5476 bytes
SHA-256: 3835bb5ddbf85688687eb4605f0f5bfb2b5130d5c64717b66331ea602179a44c
font_01_sfnt_off000125de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DE 12024 bytes
SHA-256: 00159ef3691abccae0ca9764c8ce77802137f59e0a1ee8df280f33509109472d

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