Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b180de74fa4f78…

MALICIOUS

PDF

78.5 KB Created: 2021-03-28 07:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d2e3fa953a1c139c1650c937f9829617 SHA-1: 56add5e5d23da7d2cb83f7dc27a25793256af94a SHA-256: 66b180de74fa4f78cc3d81134e2cfd70cf56ab93b69d35419bc233768c8d3c3b
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 0.9992

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://leonvi.ru/123?utm_term=apk+adobe+air+untuk+android PDF link annotation
    • http://cpskras.website/theoretical_probability_worksheet_2_answerslt2e1.pdfIn PDF document text
    • http://summer-italy.fun/how_do_you_clean_infrared_grill_grates0zrjw.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/iW8hjKp/biwifi.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/xENgcQq/jakunatiwizozofo.pdfIn PDF document text
    • http://yourbigdick.space/pasekotihtl.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/Xif5Ahe/nogewito.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/how_to_analyze_a_video_advertisement.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/ggcyhet/deltec_homes_mars_hill_nc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500001/normal_60365616cb4e8.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/new_monster_movies_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393190/normal_5ff30a9c15b6a.pdfIn PDF document text
    • http://hangzhoumetal.ru/pokmon_red_and_green_debuted_in_japanjat69.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/kamus_bahasa_jawa_kawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500910/normal_6056dab5a0a23.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/4371563783.pdfIn PDF document text
    • http://kejurudoji.medianewsonline.com/bumepovovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494888/normal_5fe6422051906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisufovofow.atwebpages.com/role_of_audit_committee_chairman.pdfIn PDF document text
    • http://bugenuvumap.atwebpages.com/21852076688.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/30600786941.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/pet_listening_answer_sheet.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/cooling_due_to_adiabatic_demagnetization.pdfIn PDF document text
    • http://dugerem.atwebpages.com/modelo_de_negocio_canvas_ejemplo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 4936 bytes
SHA-256: a5b2bc9df3894939c573834bfcb35b2fab516e37fb1105b47bca4eb07ee460f6
font_01_sfnt_off0000f0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 11224 bytes
SHA-256: 390981d4c7b4c2d66974a38f7e1b4de40f02d8522c5019b3517f5a3a20890e4b
font_02_sfnt_off0001162e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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