Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c6632e96d87f79…

MALICIOUS

PDF

77.4 KB Created: 2021-03-31 13:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 12a6ef60032212bbcaa932fc59560439 SHA-1: 5e16d4c22b1ddf8a3b5afd87d017125f79c524db SHA-256: 27c6632e96d87f79a0979af5f5eaca664a8ee62872e999908c4f6d469dfd53ee
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://soxebez.ru/wix?keyword=cathedral+crosby+stills+nash+lyrics PDF link annotation
    • http://pikejofopon.mypressonline.com/annihilation_full.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/dufesefetumujis_mizela_kawowujivi_tekom.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/science_aptitude_test_for_class_10.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/cch_ct.pdfIn PDF document text
    • https://faturigazed.weebly.com/uploads/1/3/4/8/134859690/5373334.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/reading_scales_worksheets_year_4th.pdfIn PDF document text
    • http://fetoxuk.mywebcommunity.org/15038212737.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/emerson_lc320em2_remote_code.pdfIn PDF document text
    • https://sarotokatot.weebly.com/uploads/1/3/2/6/132682281/vujebutomupi_semovavow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_357d4258fbce4d8297fcc5286ae3c71d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e95789-c6f7-429c-96fa-7f52be1b26aa/butterball_indoor_turkey_fryer_xxl.pdfIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_27b8a997dd544fc8b8a2c4f1d3bb3022.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/naruto_shippuden_game_offline_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/kibagadelija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c871bfc-5c68-402b-8022-52cd0124d309/48337162321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101fcd1f-d963-4b35-9ef5-51d3ec5a872e/83579752590.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/how_to_sync_vivofit_2_with_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/blood_diamond_english_subtitle.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/53715471958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d05032-e29d-4c29-bc11-8d46fa6ac1df/monitor_cardaco_speedo_58010g0evnp1__bom.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_e002e409d4bf4c11953b623afb13bde3.pdf?index=trueIn 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_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 5176 bytes
SHA-256: be3276e48d7f68c5fedf6cf64e29a20b0371a4dd80cc19273aa9720f804763c8
font_01_sfnt_off000102e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E1 11064 bytes
SHA-256: ccfaf71e3bca9eb073301ab96053ed8ae5bd7cfc6dfb5e125fdd4e853857afd7

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