Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b505608ff8aaad…

MALICIOUS

PDF

75.7 KB Created: 2021-03-28 16:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 67ad52e769115750deb15f4f28de6a0e SHA-1: 82de34aacc200cd9fe0acdce49d3bca357fd8c21 SHA-256: 11b505608ff8aaada8f113905d9d858e622d2d325208e7394064e53c4de6f953
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://pelibifir.ru/123?utm_term=mage+leveling+guide+ragnarok+mobile+eternal+love PDF link annotation
    • https://cdn.sqhk.co/wujozuzewed/Fgfhcje/wingstop_menu_cheese_fries.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375340/normal_5fe31c1024127.pdfIn PDF document text
    • http://wiinorama.space/finale_becca_fitzpatrick_vko4hp8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459329/normal_6010335cb08da.pdfIn PDF document text
    • http://opensoda.pro/vs_code_default_html_formatterhzxgo.pdfIn PDF document text
    • http://pr-bux.online/how_deadly_was_chernobyl0casp.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/BeijMWK/39055379562.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/jifhisQ/83387575850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_6058bb1bb0cc8.pdfIn PDF document text
    • http://goodshopsales.xyz/72637729367yndc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_6017acd7dbc46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_600f2118b867b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac9d33f-a2b7-4cd8-ab4d-fc6b9a3e1230/apc_backup-ups_xs_1000_replacement_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d536a540-a41a-4402-b35d-7bf40917d048/community_relations_definition_sociology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa71a65-b550-4100-9757-a9065c666bf3/used_starcraft_boats_for_sale_by_owner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2851b949-3179-4cce-a659-a479bf976225/59133980834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76dd336-b25e-46f4-adcc-60923d1dcfa3/foxconn_n15235_drivers_xp_lan.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/jordan_river_bc_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/notizunokezovivumazox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d570bc-9bf9-41f3-acc0-637738a56f81/digital_photography_magazine_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/pazepog.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/gafigivulekugiramu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25596ab-176a-4fe4-94f5-df87fffa6d84/star_wars_the_force_awakens_fan_art.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_off0000e7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D6 5236 bytes
SHA-256: d81cacc5179a8998b48a12446b54e6344f652f8e6bf3d8f4922da0e3033d5908
font_01_sfnt_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 11076 bytes
SHA-256: 2d16a5bd80abf8d4128aa043d4fd03a308762031451fcd714068974b8fdd1b11

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