Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e54d1db832b3c28…

MALICIOUS

PDF

77.4 KB Created: 2021-03-22 13:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 28b45f9758978889aa2a6e3bfa88a9cf SHA-1: 48344ba42401e3f3ecff2f7f6e0875224c5ac7b8 SHA-256: 6e54d1db832b3c284c69da55b3cfdbc3b4c1bcec648c5d1ba041693ebef75039
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 0.9991

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://ponafet.ru/wix?keyword=area+of+right+triangle+worksheet+pdf PDF link annotation
    • http://ig-mediateam.net/topozibivelorv0l3.pdfIn PDF document text
    • http://cmb-accueil.com/broadsheet_hobart_breakfastlsbet.pdfIn PDF document text
    • http://storefromit.pro/4k_ultra_hd_wallpapers_for_iphone_77cnxl.pdfIn PDF document text
    • http://korecos.ru/tedaw8uqbi.pdfIn PDF document text
    • http://profaudit32.ru/fafifavoriwavik7qlg.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/waroloredapizubev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_6021241a3777f.pdfIn PDF document text
    • https://zofijakifixanow.weebly.com/uploads/1/3/4/6/134677560/dileduroxul.pdfIn PDF document text
    • http://musofiron.ru/labuzuritesagamevurorege1olsu.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/b21f6adb30837d.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/verbos_en_ingles_en_todos_los_tiempos.pdfIn PDF document text
    • http://begimewabifax.getenjoyment.net/rusositubavotasufigopoja.pdfIn PDF document text
    • https://sunozidugeb.weebly.com/uploads/1/3/4/4/134486191/3997387.pdfIn PDF document text
    • http://curvepreloved.com/sound_recorder_app_for_android_freeeiczm.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/how_to_analysis_data_in_data_science_vs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_605451e897409.pdfIn PDF document text
    • http://vivadoctor.ru/wigudikozik5em5b.pdfIn PDF document text
    • http://life-news.tech/29183495802j4ctl.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/vebogotexaf/porcentaje_de_cesareas_en_mexico_2018.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/pdf_file_convert_to_word_document_software_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/duweketafavu.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/45109790382.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/setupiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/niv_bible_for_android_tablet.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_off0000eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 5448 bytes
SHA-256: 87bcb575f28c7eb6fa1adc21721f6bff22c5b29f5a9eb84b4a95e96605371b87
font_01_sfnt_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 11260 bytes
SHA-256: 269c07bb4ec2aa073a66c5077e2be0d209d240d896395de5aec49b3ab0e3e9a1

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