Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ee1be54293d67d…

MALICIOUS

PDF

76.5 KB Created: 2021-05-05 01:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6b54d224df5f7f63ac39753279764d3 SHA-1: de0e36bd9208926fd4a7c4167a049348e2f1731c SHA-256: a0ee1be54293d67d364dd50661482801854985763ea780c14d8edd4f00db5608
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://jacksth.ru/strik?utm_term=remstar+pro+2+filters PDF link annotation
    • http://usersonlineguardingsettings.site/79426300885m1x0m.pdfIn PDF document text
    • http://hermidkovo.info/73640713502brh7u.pdfIn PDF document text
    • http://cheapkeys.site/gezazujokezimukito60r9a.pdfIn PDF document text
    • http://wifefavowe.iblogger.org/75076257465.pdfIn PDF document text
    • https://cdn.sqhk.co/bulamije/bZigiit/arcade1up_mortal_kombat_stool.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/jujjAgc/2144040027.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/cjgsBgf/gimejibaseduvizivilapujak.pdfIn PDF document text
    • http://fruit-italy.space/what_does_mind_control_dozbs8j.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/TjbKics/pokemon_go_eevee_jolteon_name.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/jijiifQ/50066169574.pdfIn PDF document text
    • http://eroganoficial.site/dd_dm_handbook_5egybzu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vupafigimewex.rf.gd/central_park_5_movie.pdfIn PDF document text
    • http://dogibuboka.rf.gd/the_secret_life_of_bees_chapter_2_and_3_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f977454-fc9b-48c0-a438-a14fc5e7e07a/10_palabras_agudas_graves_o_llanas_esdrujulas_y_sobreesdrujulas.pdfIn PDF document text
    • http://lewabebobi.rf.gd/33249674508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f748075e-2859-40ff-b496-f4f1bc37c0b0/what_does_the_enchantment_projectile_protection_do_in_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bcfe12e-5aa1-42b1-a22e-0fca8c7151a4/one_thousand_and_one_nights_in_hindi.pdfIn PDF document text
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_e481d9c4c6cd4fbbacd203d1ab37a0c6.pdf?index=trueIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_56359123165243fbad3b944fd7175ec4.pdf?index=trueIn PDF document text
    • http://jutebef.rf.gd/cash_bill_receipt_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 4868 bytes
SHA-256: b1ba77afd1f7c5ccac3273acca9893103c723f7afbf00e36f3184b8595c7a7b0
font_01_sfnt_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 11740 bytes
SHA-256: fca120b12eb71c706b0c2562e1bc392bada721ccb826a934ef37098650f2389c
font_02_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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