Malicious PDF — malware analysis report

Static analysis result for SHA-256 365d34f926147bb7…

MALICIOUS

PDF

82.0 KB Created: 2021-03-10 01:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e9e484cacdd600c5653130b8d46de70 SHA-1: d0b6363687d689dceb06942cad21f1ed15d12a06 SHA-256: 365d34f926147bb726ee97a909919decd97cf066cc787f97ee13ec929275e830
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/award?keyword=bilateral+and+multilateral+trade+agreements+pdf In PDF document text
    • https://cdn.sqhk.co/fuxivuxovu/ayY933M/6_clues_for_hgn.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/bipobobifog_vawuvuma_kubimazejonugo.pdfIn PDF document text
    • http://vutunema.mypressonline.com/garmin_gps_drive_assist_50_lmt_avec_camra_intgre.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/7b1dc4cd704.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/ijphhf4/boxhead_zombie_wars_2play.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/a6gijzj/87551654439.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/sewimit.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
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_ddb147a7c5e94068832c50e646e5a657.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_460538893d6d41f3b36c12176aa19d33.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_70bd026b2bd34f78a614f29fdb33da36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87910ed9-1f33-4782-9db7-467998a8b7ab/3357050022.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/affinity_designer_vector_brushes.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/discovering_psychology_the_science_of_mind_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4033be6-f365-4851-82a2-0ea7ab9fba60/munetosisoxiwagudi.pdfIn PDF document text
    • http://tediguku.atwebpages.com/el_catecismo_revolucionario.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_e07889aab98c4c1994f26673125d7502.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc14bd8c-010c-4b0e-b5b0-4a2f9f83b97c/dark_season_2_release_date_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/bureposonakunovek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f27c02d-9804-4988-8ec9-99243ed72b95/28211020862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332fcf63-09ec-4433-95e7-0ebd715bf3a8/how_to_hook_up_surround_sound_system_to_tv.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_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 5180 bytes
SHA-256: 8c031c3761d0301479df9adcefdccfb609715488cfd0c535ae77743e39c4e0c2
font_01_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 10708 bytes
SHA-256: f0a1e7299f624626d6d96193bc1f149c41b98cf0cb6b586a930fbf14f1b32a23
font_02_sfnt_off00012c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333