Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad30b6f9bd9d3584…

MALICIOUS

PDF

79.5 KB Created: 2021-03-29 14:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d45323c6458502271e5a010a9020ceea SHA-1: 52a2ae92bced8514195c240d33a1975b061673ec SHA-256: ad30b6f9bd9d3584a9db351f258cb070646c33651a885b4c0bc50f20303bf402
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 0.9996

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://leonvi.ru/award?keyword=brain+games+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/supesuvepo/d5jjWt9/telugu_movies_2018_list_imdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_600f6dd4ca52c.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/uluXhb4/broadsheet_news_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5fc7cea63be74.pdfIn PDF document text
    • http://zejufixapoferu.iblogger.org/neo_bomberman_para_android_apk_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/iiQZCjh/49200583983.pdfIn PDF document text
    • https://cdn.sqhk.co/dagizonu/f0jbidz/zijivipelidujom.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/gdKgjbH/43745605993.pdfIn PDF document text
    • http://xoguvux.22web.org/jozijozonufopemake.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekajebema/a7Tjbjd/26337500826.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/ezRgev9/guilty_civil_law_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/I0KR4jc/guxidarujebalaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_60540929efb7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuxipuretox.rf.gd/73713490591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062981ca-2915-4853-8277-b6a410e74c79/kazipovugasizezosutoxenam.pdfIn PDF document text
    • http://weverikovufom.rf.gd/guluzetesisafixurinabaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/676aac26-9767-47f0-b17e-740994f87d5d/aprendiendo_un_curso_de_milagros_leccion_141.pdfIn PDF document text
    • http://rizusuzapil.rf.gd/adobe_acrobat_pro_free.pdfIn PDF document text
    • http://lizibafolajoril.epizy.com/mawelawijal.pdfIn PDF document text
    • http://doroxepazu.epizy.com/40573118573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3800e30-ddf7-4185-94c3-028f5c3d9ee4/medical_surgical_nursing_9th_edition_lewis_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c099d5db-c137-47a2-90c1-1fb645806237/what_you_mix_with_crown_royal_apple.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_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 5504 bytes
SHA-256: 86a64303a71fd4c08a1ef8c61110783eda85e83799d31640e17a1e44f3428a6e
font_01_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 10508 bytes
SHA-256: ee68e0794595b09f14fc60afbf691fdffa2747741a45483caa433c37cb9470d5

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