Malicious PDF — malware analysis report

Static analysis result for SHA-256 e063eb059339f291…

MALICIOUS

PDF

76.0 KB Created: 2021-04-02 08:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 924ebbfe11d8e5826749c1ee661fb9a1 SHA-1: dda65fd59438a61f6774081fd63c354e9e8bf6a3 SHA-256: e063eb059339f291178f522b05470dfb32b7f7584883471b8cc9f44f0c5e8322
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9999

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://jumiwimov.ru/strik?utm_term=what+is+the+best+answer+for+biggest+weakness PDF link annotation
    • https://zijubanefim.weebly.com/uploads/1/3/4/3/134349059/zijafag-pegobik.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/kanexe.pdfIn PDF document text
    • https://jobovivubip.weebly.com/uploads/1/3/5/3/135392816/kobesunizusazef.pdfIn PDF document text
    • https://ledunadexaw.weebly.com/uploads/1/3/0/7/130775166/690f6396669f.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/pomil.pdfIn PDF document text
    • http://bepelisufozasep.mywebcommunity.org/north_america_political_map_download.pdfIn PDF document text
    • https://xonamova.weebly.com/uploads/1/3/1/3/131380547/rokisa_makajatevotufux.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/1e2ec97a-6ac5-4891-a37f-78e4095004b0/17024368954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d019754-703d-47fa-a91a-398c53a06453/gavigeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167e889c-3504-4eec-8b39-abb94b3646db/tree_of_life_movie_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197b4517-a377-4256-9a5d-e7e481a0b493/romeo_and_juliet_act_2_scene_3-5_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3f2d17-feea-46d5-8972-0f3bafbdc3d2/how_to_reset_a_genie_garage_door_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616472d0-181d-4aef-b694-20246ab897cf/lock_pick_training_kit_amazon.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_744ab6dc6e29498abab9b966d4fa69d9.pdf?index=trueIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/geological_time_scale_chart.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_e7d79539a3064b1991ca09767e40be23.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_7ce28d053eec4aa3b72cac1142c7ea1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d763bc-a36d-411c-b8b5-d1bf2b5e3779/thomas_ligotti_the_frolic.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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 5304 bytes
SHA-256: d3f8f4af5b4e8b79c919187026311d2d7a940e930e7071368ce3e28d746b8d44
font_01_sfnt_off0000fda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA7 10516 bytes
SHA-256: 59a6eea6fbabc0a240ad7f92af702b38a67b3f1c526174a426b05695a6e75764

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