Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f3d639e5c41b50…

MALICIOUS

PDF

83.2 KB Created: 2021-04-21 22:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b8e7df6e20a0da07220aee5dbf888061 SHA-1: ebe2d1dc79ad0362e91f7492c8017b83d6b877ef SHA-256: d6f3d639e5c41b509acfddd5ff74fdf9f7f60ad3cc53a623a8ce8dc9d2a189d1
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 0.9970

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://kuzutuzo.ru/strik?utm_term=kenmore+microwave+oven+combo+recall PDF link annotation
    • https://gapivawaki.weebly.com/uploads/1/3/1/8/131857152/gugilikixote.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/nespresso_vertuo_capsule_guide.pdfIn PDF document text
    • http://euroshopme.site/southern_reach_trilogy_epub97f2l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_6002da9a92b91.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/qa1haIG/99187505694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_603917b03cfa7.pdfIn PDF document text
    • http://termometr-medikal.site/30975303390nc7b3.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/3837666.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/Bghhage/42563859137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457620/normal_603c088a2ce69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416513/normal_6010c8838d3a4.pdfIn PDF document text
    • http://bristol-yalta.run/honda_civic_service_price_malaysiaj4okw.pdfIn PDF document text
    • http://mydenverneighborhoods.com/husqvarna_455_rancher_bar_nut_sizeqd62o.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/bitexolabebo.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/powermax_model_pm3-55lk.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/glijiaR/how_to_go_viral_on_youtube_2020.pdfIn PDF document text
    • http://foodguideblog.com/rogonaripokugidimogideqzxvy.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/8891328.pdfIn PDF document text
    • https://webuseki.weebly.com/uploads/1/3/2/8/132814302/9634079.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekisofekibote.myartsonline.com/gexivowezobarez.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/2454382913.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/daily_bible_reading_plan_in_chronological_order.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/how_to_set_alarm_on_timex_clock_radio.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/bubogabilut.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/bsc_nursing_2019_application_form_date.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_off000105e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E4 5028 bytes
SHA-256: 34f0312d9116c358e86c17876370d5a05404a8e8ead7979b16d49cb0ceb4e35f
font_01_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 11276 bytes
SHA-256: ca0e8581aaa8d8394a8296ad11ed1a5287011224b031e9f8f06dff0867b74347

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