Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fe7ab98e1f0ab0…

MALICIOUS

PDF

76.2 KB Created: 2021-03-11 17:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e2afbecbc2b1350d95fa647fdc66c17a SHA-1: 2cbdd16fb4f99ba4a6a759240124028bfe9cb85e SHA-256: 88fe7ab98e1f0ab0c23f622e935a65d8374fda8465873555b7d3493b9c9e4f20
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 0.9996

Heuristics 5

  • 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.
  • 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://resalured.ru/123?utm_term=drop+down+list+in+excel+another+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490133/normal_601ae02a9dc75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420240/normal_5fcdb6fb1c57c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5ff16c0c3caf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5ff9e29f79586.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/dazovosugev/cogs_analysis_report_in_sap.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_492011a716ac4dcca07b0907776e9ff3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xurixado/adventurer_enrollment_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/python_3._6_kali_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/how_to_day_trade_25k.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_4b02e392caa647c7af4e0e9b73940f5f.pdf?index=trueIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_7cfa2659e08b4a7d94264f275cad6ab1.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_fbefae110b3040d8b2600016ec99809d.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_15c2c2fa958f4f158e5fac74fca497f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/welanisowari/vanagavitana.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/responsive_landing_page_html5_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/cavendish_online_isa_transfer_form.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_478607283bd14778874237a2614727cd.pdf?index=trueIn PDF document text
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_eb2a0af069f44f17921127281cf27d24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/assetto_corsa_tracks.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_64fb09766e784304b5d7968f791ac5e1.pdf?index=trueIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_f7fe1a225c0a47e4971e9790bb185fb5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/doubling_and_halving_year_3_worksheets.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 7

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_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 5320 bytes
SHA-256: b250ee817e8625fa895e2078ecb87db3f71c96495b20386561c00494c1939f59
font_01_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 11316 bytes
SHA-256: 54a4cd1d113a92493889b19e5493b35001b99a65b7aa0ac741dd7a4ba96f7b42

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