Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f006c6ea4b46a10…

MALICIOUS

PDF

66.3 KB Created: 2021-02-13 16:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7c7c5f902f502e717b1e4f95b54b40fe SHA-1: a301dbacfe4f23295323f35f427a6297ea503c9e SHA-256: 2f006c6ea4b46a100ce2162dac69e7de9a00a55850a360da2933115eaafcecb7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=the+mincing+mockingbird+guide+to+troubled+birds PDF link annotation
    • http://sarhello.online/kumpulan_sop_akreditasi_puskesmasmphhb.pdfIn PDF document text
    • http://clubstore.pro/gewosajifaditalen7fpoi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fdacf4d7db4a.pdfIn PDF document text
    • https://ruxetire.weebly.com/uploads/1/3/1/3/131379726/f5199ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_5fe82c9fc9142.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384650/normal_5ff51bdfe534f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471275/normal_5fcaf5b49b816.pdfIn PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/xugixabajuluxen-dakutefenerar-disawop-padexegegejov.pdfIn PDF document text
    • https://ladifibefumuxuw.weebly.com/uploads/1/3/4/3/134353250/836366.pdfIn PDF document text
    • http://tiktokhd.design/wedosuzefekesb49zo.pdfIn PDF document text
    • https://xadaxiwunitari.weebly.com/uploads/1/3/0/8/130814235/1258926.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/zewimu/26059419262.pdfIn PDF document text
    • http://gibapomidumitar.rf.gd/92086153187.pdfIn PDF document text
    • http://poxemibusap.epizy.com/dallas_cowboys_cheerleaders_uniform_over_the_years.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_off0000c5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CF 5296 bytes
SHA-256: 07859eb4f07632c8533e8c58091557a98628606c698cdd19c5df0ec959e0baf9
font_01_sfnt_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 10752 bytes
SHA-256: 8ce6dbf7ed040183428c6c7d51f1943531f7ff3292123939d41e4953032ae51c

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