Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eeceb3572a729d9…

MALICIOUS

PDF

78.1 KB Created: 2021-06-10 02:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ec22d8505e1c65b0f590163ecb4dce1 SHA-1: e10cbcbdb3eb7067cb1694320cddc9c4d433ddb8 SHA-256: 8eeceb3572a729d93453b89edae0d42d2fefd598acec4bb24f553c174078dc01
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 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 0.9998

Heuristics 5

  • 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.
  • 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://pistant.ru/pbw?utm_term=free+hd+movies+apk+download PDF link annotation
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/rozitezuxeti-totatetilodeka-rononisobef-wawoj.pdfIn PDF document text
    • https://tolafapod.weebly.com/uploads/1/3/4/4/134486806/bifekosire.pdfIn PDF document text
    • https://tukukanabov.weebly.com/uploads/1/3/4/4/134444705/e28ae348bf9.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/dabebeditoxos.pdfIn PDF document text
    • https://kepijiloxa.weebly.com/uploads/1/3/4/1/134108658/lugada_ritezumegagere_debiweka.pdfIn PDF document text
    • https://pikofejuja.weebly.com/uploads/1/3/4/4/134478885/6586994.pdfIn PDF document text
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/a6fccbc0bbf976.pdfIn PDF document text
    • https://puviguwa.weebly.com/uploads/1/3/0/7/130776677/rurip-razugox.pdfIn PDF document text
    • https://woxevawalonot.weebly.com/uploads/1/3/7/5/137517472/4485386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_606dc5c076d28.pdfIn PDF document text
    • https://wojosonasejedop.weebly.com/uploads/1/3/4/6/134613238/sumivabo_wujaxedulolin.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4490953/normal_60b1444915dd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://patimedudemu.pbworks.com/f/dixepuxik.pdfIn PDF document text
    • http://zusemivak.pbworks.com/f/capitulo_5b_restaurante_elegante_answer_key.pdfIn PDF document text
    • http://daridameku.pbworks.com/w/file/fetch/144639510/athlean_x_workout_plan.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/w/file/fetch/144844332/how_to_recover_files_from_android_after_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f233776-9bf3-42e4-8c8b-fa58c8d6c39f/zilowadufoburimakivo.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144414483/economa_bsica_rodas_carpizo_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1b32e9-658d-46c5-abcb-300bbcbd45f5/powerful_igbo_worship_songs_mix_download_mp3.pdfIn PDF document text
    • http://sawebaz.pbworks.com/w/file/fetch/144801075/78565361501.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_off0000f346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 5368 bytes
SHA-256: 6f86c1c3a203793e84d171ef79e613c2456ea1f287b5449ea62afffd0cc88b20
font_01_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 11336 bytes
SHA-256: 45354f7fdec98729fc247650e2752594e0febec210df6cdcfe4d125d09c7324d

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