Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c76f6dee7a40f9…

MALICIOUS

PDF

80.1 KB Created: 2021-04-15 02:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7dc55ed99030885f6a840327a088b305 SHA-1: 11a54e55e82fe4e383ba085c9f5ed701d7530c18 SHA-256: 43c76f6dee7a40f9fa8add75d80937491268ae9768565efcab14e0d356de74fd
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://maypoin.ru/strik?utm_term=is+evolution+a+fact PDF link annotation
    • https://cdn.sqhk.co/lasijutag/sjbihgv/vpn_for_pubg_mobile_lite_download.pdfIn PDF document text
    • http://republvinb.fun/abp_news_marathiq5w1r.pdfIn PDF document text
    • http://radanews.site/lasuxiretakezgnfuj.pdfIn PDF document text
    • http://onatural.space/radio_shack_radio_controlled_clock64z4c.pdfIn PDF document text
    • http://lessonsonline.site/buitoni_ravioli_nutrition_informationjgbpn.pdfIn PDF document text
    • http://trynutra.shop/5801768239461izn.pdfIn PDF document text
    • http://medyayazilimtr.com/silent_hunter_5_mods_alles_freischaltenzr7hr.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/X4gfwqf/povox.pdfIn PDF document text
    • http://habercigo.com/27964145248yzy19.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/eIDjieu/29585238327.pdfIn PDF document text
    • http://twirlini.com/85278721419onpzw.pdfIn PDF document text
    • http://8bitbeardsco.com/14481605064y4et6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/valuligalanebapowepeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902f84fb-cc0d-4f03-b1e2-67448bb6781a/what_is_the_theme_of_once_upon_a_time_in_hollywood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bd48faa-eab8-4a82-95f7-500d0e20ff08/nifavu.pdfIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_7012be025a5149a79f0a4f955e15fb33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/what_two_raw_materials_photosynthesis.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_97446907701e441c88eb9ccb88c03560.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fulazelof/2017_bollywood_movies_free_in_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/reloading_powder_scales_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/books_free_kindle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8a1523-495d-4ecd-b6eb-5388b2156b13/26369377574.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_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 4776 bytes
SHA-256: d021b96298032f8bab01015a3ef83ae0082714e7d787e519710dcaa17f7deeb7
font_01_sfnt_off00010c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1F 11268 bytes
SHA-256: ca261c0da6f767e8b5d621f9040438e30a770509e5bfec3fdfe4737af57113a4

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