Malicious PDF — malware analysis report

Static analysis result for SHA-256 2750b098efffbf04…

MALICIOUS

PDF

77.1 KB Created: 2021-03-15 22:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6de628a933058b77dc68d4b440cff29c SHA-1: 2f6f114fb6a29b4d14ee5dbdddf13129efcda198 SHA-256: 2750b098efffbf0486ab4160111c9c52607966e6321f2f50c6d777da3be8b1e4
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=general%2527s+handbook+2018+pdf PDF link annotation
    • http://lowabunuzoxa.getenjoyment.net/english_for_academic_study_reading_and_writing.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/acls_2020_espaol_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_602f0a7164670.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/UeQXie5/94409619779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_602979e086a21.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/gjjfhcR/ice_cream_maker_machine_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498376/normal_5ff64d3b9d91d.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunusol/fgcbjcs/pixitracker_apk_obb.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/common_core_standards_math.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499021/normal_602f35908eae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5fe66c6d02169.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/calories_in_rice_per_cup.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/bemobejizizasakiburo.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/rekorewexidiwo/how_much_is_my_howard_miller_grandfather_clock_worth.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/phrasal_verb_spanish_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/ec_council_chfi_v8_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/american_colonies_alan_taylor_download.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/nedekumubanuxafuf.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/symbolism_in_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c396663-c6e5-4714-84c5-dae7ee2fcfdd/girl_interrupted_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd13a6e-2ed8-447a-b4cc-0c5cbf8ccb61/xatewotojazilazujo.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_off0000ef8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8E 5916 bytes
SHA-256: 83b85d3db6884106d09364f87eb2e15d86072218fd1d25f83d88cfd0d3f021c3
font_01_sfnt_off000103ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AD 10492 bytes
SHA-256: f4f508113bbe882142feee2ad7a0093ff635acea60b9c6755bfc381bebbfb23f

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