Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9c48c7aae6939a…

MALICIOUS

PDF

77.4 KB Created: 2021-06-12 03:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 422aaaa374d69a4ebcefc854ef25c270 SHA-1: d705c49d35cddad981ccea26c9e515ccda9c3f6c SHA-256: cb9c48c7aae6939a8dd1e463deeab50ab87e8e82c73a482ff8d0dc48fbd50f2e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the primary URLs identified is https://infrive.ru/pbw?utm_term=golden+wind+manga+free, which likely serves as a redirector to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://infrive.ru/pbw?utm_term=golden+wind+manga+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385620/normal_5fe00b73646f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420915/normal_5fd6439d214e9.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/nusas.pdfIn PDF document text
    • https://pabedimulexi.weebly.com/uploads/1/3/1/6/131606760/6644106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490516/normal_60159290c0825.pdfIn PDF document text
    • https://xefanopebowemid.weebly.com/uploads/1/3/2/6/132681782/tarofibajunug_xewek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_6011b8b438e38.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/kivolobexipu-kuwuvigu-rasixiv.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/800914ee-44e3-45b2-8589-c48ea679b8bb/warm_bodies_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93ec0a4-8298-431a-b2c9-ce55b12b5d71/18234627045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bccb437f-7c83-4450-8dc7-df388f699e18/biblical_meaning_of_mathematics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd449ae6-620c-41a2-bf6f-a07d66b82427/how_to_fold_a_gazelle_glider.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84783766-c6e8-492c-b3c0-95e2ce604bb4/how_to_create_multiple_streams_of_income_in_your_20s.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/53361343498.pdfIn PDF document text
    • http://giribuv.pbworks.com/w/file/fetch/144596925/votusazewuxasuzizutamojew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3c1fd2-ce0c-4fb7-bf8c-e49fea126a08/el_sindrome_de_ulises_joseba_achotegui.pdfIn PDF document text
    • http://nubuzefi.pbworks.com/w/file/fetch/144656451/siduvopidutiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49a3502-d599-41e5-a162-bdc81338c6fd/powerforce_compact_vacuum_not_picking_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/785e9831-936f-4770-8dc8-8f20c9958b1a/how_does_netgear_powerline_1200_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eec4af1-4a9f-4ef5-92e1-bda776b84020/goleramuduwaxewufojifari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d190a78a-cbca-4931-8a9e-657c4fa6ed30/68242221826.pdfIn PDF document text
    • http://metukamef.pbworks.com/f/video_editing_app_android_no_watermark.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 5172 bytes
SHA-256: 98e730baa4c9dc248eb4cee664f340108d0c942dd9fdd13f99c8b8183efb639a
font_02_sfnt_off0000f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 2448 bytes
SHA-256: 018ce71b03b0a860c0ee1406fa1c339842934110decf584f70a47bddefc2fcd4
font_03_sfnt_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 10904 bytes
SHA-256: 81f23d1cf7ef5f21a191a4b0be84da306ce33de950d3069b478aca441989e213

Open this report in the interactive analyzer, or submit your own file for analysis.