Malicious PDF — malware analysis report

Static analysis result for SHA-256 217bcd2190a7ce52…

MALICIOUS

PDF

78.2 KB Created: 2021-03-23 06:35:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bfff36b2d2f1f2bd1708948d2aae535a SHA-1: 88a988315bf1bcca76714d73343c5d0469c8c13e SHA-256: 217bcd2190a7ce5211e10aeb4397b7ca2e16d1a9afcb2d9d3d821c2814525dcb
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 0.9996

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://nipisod.ru/123?utm_term=beleaguered+castle+solitaire PDF link annotation
    • http://vudifabofugejij.medianewsonline.com/vejujuvakofofupelu.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/5c482116d.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/tutorial_ms_office_excel_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_6019f23529236.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/pidakusudozefanobomiwu.pdfIn PDF document text
    • http://felulam.22web.org/makalah_metabolisme_karbohidrat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5ff1b5be688b0.pdfIn PDF document text
    • https://sosubewuwebefa.weebly.com/uploads/1/3/4/3/134360265/4079655.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/84545989693.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/gilitubuxala.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/56069102341.pdfIn PDF document text
    • https://tovamegudisolos.weebly.com/uploads/1/3/1/4/131411857/8308219.pdfIn PDF document text
    • http://zolepop.mypressonline.com/pdf_to_word_converter_free_download_online.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/84751592578.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/litedumizezadiseva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevapugono.atwebpages.com/zapiriwoge.pdfIn PDF document text
    • https://a134ef9b-a212-4d8e-a35f-da3d896bbd40.filesusr.com/ugd/dadc92_c4e257923eab4000b6b2dc97f1cda047.pdf?index=trueIn PDF document text
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_89fbcfe36e3e47ceb69483b53cb405ff.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_754df24b21f0463d9c6a25711e10864f.pdf?index=trueIn PDF document text
    • http://nopowilaleso.rf.gd/pagemigexajunavipufova.pdfIn PDF document text
    • http://lofadezowudekeg.epizy.com/tenra_bansho_zero_espaol.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_b9ee7c5592c049e4a6795a8e44d1aad3.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
    • 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_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 5156 bytes
SHA-256: b57e18c88bc58061e7c3b11ea835f2ea1a525c6a22507a14d410706bfb9d4d68
font_01_sfnt_off0000efb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 11104 bytes
SHA-256: 9b3102cc9333898a9a41b48c6dc12f8b31a14795c4406f953b821903654ef249
font_02_sfnt_off000115bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BB 16208 bytes
SHA-256: b138d3e09a3de7d40c951d1cc7efbdf58cdda7284ff8736a4554d575500dbdb4

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