Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f176fab3268f9e1…

MALICIOUS

PDF

73.8 KB Created: 2021-03-23 10:33:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5a7f4fba113ffd5e1286e8e1a3bd0e90 SHA-1: 5a0a9c10edbcffd1bdd207784c3a267c52dff136 SHA-256: 4f176fab3268f9e19635867818080f68bed73664ddc793752ef78b399527754a
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://vilenefex.ru/strik?utm_term=hieroglyphics+letters+a-z PDF link annotation
    • https://cdn.sqhk.co/muzorefu/XNGRK57/d_d_5e_ranger_animal_companion_list.pdfIn PDF document text
    • http://erkutungotu.com/presentation_on_artificial_intelligencecyi5g.pdfIn PDF document text
    • https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/mosaleriruxuzapizal.pdfIn PDF document text
    • https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/4905251.pdfIn PDF document text
    • https://lowexupunodod.weebly.com/uploads/1/3/4/8/134896298/gimifow-fufizejega-fuvaxikidad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_6039a3cc92baa.pdfIn PDF document text
    • https://cdn.sqhk.co/woxezelej/Sciitxo/dragon_ball_theme_song_download.pdfIn PDF document text
    • http://handler-autoscout24.com/is_the_movie_catch_me_if_you_can_on_netflix2bl5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415767/normal_5fc85e45ed989.pdfIn PDF document text
    • https://dawekemukodo.weebly.com/uploads/1/3/4/4/134491409/tusigexaxidaje_jasijil_repab.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/SJgeidH/crowd_city_zombie_skin.pdfIn PDF document text
    • http://fastpeysistem.online/pafozavoxogilugerenugujo964zp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483082/normal_5fe3f522331fe.pdfIn PDF document text
    • http://thedefenseforge.com/definicion_de_investigacion_cualitativa_segun_autoresd4tyf.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/zebarufuridorur/jmi_b_tech_admission_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/mia_farrow_son_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/configurar_citra_android.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_4bd2e8fb224a4b6c95c4de9615271ba6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/beholder_2_android.pdfIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_4dd077bd009943b9b2051200ee259bbd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubeto/instrumentum_laboris_amazon_synod.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_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 5340 bytes
SHA-256: f6df8943fd9974da3aaa3da5b992e93533e5fdb7ac5791a9f7c764be467a8740
font_01_sfnt_off0000f40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40C 10616 bytes
SHA-256: 35fd848c57384364f8380c1294b4afaafbfb7c08627900a5025430392df69695

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