Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc49a0fe31ebc954…

MALICIOUS

PDF

90.3 KB Created: 2021-03-15 04:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 32544f53fa5f14db85b64224e2ac4d8e SHA-1: 10d0a583f5d187648882cde72c5a12ee6a0328b8 SHA-256: bc49a0fe31ebc9542475705483168834624aa3d13d5802ae7d6d7e467f783081
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 0.9997

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://zajinet.ru/award?keyword=abramelin+book+pdf PDF link annotation
    • http://kojazunupetip.mygamesonline.org/43182798063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491164/normal_5ff76c06976dc.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/97c89.pdfIn PDF document text
    • http://woodlesenka.ru/how_long_does_rolex_tritium_lastq5l58.pdfIn PDF document text
    • http://hopecommunitynaz.com/279902157861z3x1.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/21509102998.pdfIn PDF document text
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/7988755.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446399/normal_5ff1655c28b1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_600fe90b0f261.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/business_management_degree_online_uk.pdfIn PDF document text
    • http://logvoz.ru/gigumutadujapofagiloxelwyh6.pdfIn PDF document text
    • http://repair-kompov.ru/sorifebevawupinaduzuse4i97g.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/kunukaf-sexoboxul-lasejunusesizum-supexotuzom.pdfIn PDF document text
    • http://marketes.pro/gukupirjrpi.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/how_do_you_label_circumference_of_a_circle_with_radius.pdfIn PDF document text
    • http://vifubavawet.mygamesonline.org/effective_communication_techniques.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/206591966.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/51493458101.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/tuzukawafobuvezubodibip.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/bipowopiwid.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 5200 bytes
SHA-256: a5b319f1f0cc00b70cffa5aa5d445e151d7b9a61229bddeb879625aa3db819c5
font_01_sfnt_off000119f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F2 13636 bytes
SHA-256: 2e51bf11e9d22b1f228eb08b93a5dc67bea00278cf0bf81970463248e8f8ac86
font_02_sfnt_off000146b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B8 16088 bytes
SHA-256: 7b61b80ad9eae8da687db589656cc14036b78b470666db3a00a61726a6371a4d

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