Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d83a221f9b495c…

MALICIOUS

PDF

72.2 KB Created: 2021-03-23 05:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8089236fcf0cfdf0e8d1faf7c322916 SHA-1: 54624fb8333e91d3239a2ec986f0dbe92a64393c SHA-256: 88d83a221f9b495c09c02ff98bdfdd29750dfd5ea2656a1c28a9cb25a4dec8ab
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/award?keyword=bin+sachivalay+model+paper+2020+pdf PDF link annotation
    • https://bolubevegu.weebly.com/uploads/1/3/1/4/131454373/69114.pdfIn PDF document text
    • http://sweetygirl.club/how_to_reset_service_engine_soon_light_nissan_pathfinder_2001uf7sl.pdfIn PDF document text
    • http://socialwave.me/certificate_of_origin_form_doc5ivxr.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/ixvPEji/ocoee_river_rafting_cabins.pdfIn PDF document text
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/degipaf-tigipapizuwara.pdfIn PDF document text
    • http://prechambre.xyz/78791129756oiln.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/bavixu-tozujedawo-juwabozaw-ruriroxe.pdfIn PDF document text
    • http://anarchymedya.com/sejewunudbk7h6.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/jPdidhj/slot_car_truck_pulling.pdfIn PDF document text
    • https://mokaredoraxo.weebly.com/uploads/1/3/4/0/134095924/rupew.pdfIn PDF document text
    • http://freedate18.xyz/directorio_telefonico_para_niosuocso.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/jbSLjaw/80424912156.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa52f604-1f74-45b3-8daa-3a70ea55be48/lojekutowukerire.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/58912714471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e888cd2d-d5a0-45ce-bf06-772bebad15f9/wamadibasolat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a856ebe9-e389-4642-877e-81c8b9b4294a/bosch_axxis_washing_machine_where_to_put_detergent.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/5150396894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728a2c71-3213-4c10-8562-4ebdf39d01b6/86742815001.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/savage_model_320_slug_barrel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75973d8-632d-42c6-b1b2-d76c12fb421e/how_to_self_clean_samsung_vrt_steam_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa1332a5-c7fc-4f5d-b4ee-df02e6c62ada/best_movie_quotes_of_all_time_afi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 5880 bytes
SHA-256: 6900281682a19824f44c151396e94842a4c07163e90cc2b32896e5aa30e05026
font_01_sfnt_off0000efa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 10620 bytes
SHA-256: a0c78339058914c78fbbabc7cbbf413f335a045ae6390d7fdfe089dd672353ae

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