Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb683cfd4f63a377…

MALICIOUS

PDF

75.2 KB Created: 2021-04-13 05:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dc31f4df629af8dba38686eae5cbc5f5 SHA-1: 8a34c94fb656737f592211eaf35286ba9615b463 SHA-256: eb683cfd4f63a377d842f521add8737a055263b3dc1bf634c8de6098589fcfcd
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 0.9997

Heuristics 6

  • 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 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://maypoin.ru/strik?utm_term=sector+alimentos+y+bebidas+ecuador PDF link annotation
    • https://cdn.sqhk.co/fosulavale/ogdhiid/88259173282.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/hWmpiiu/buxuver.pdfIn PDF document text
    • https://cdn.sqhk.co/dolavalof/Xhghcna/3d_game_maker_software_pc.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/antenna_theory_balanis_book.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadidizi/zjaChij/drawing_pose_reference_app.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/hcysBRe/superhero_run_game_download.pdfIn PDF document text
    • http://tupujetu.sportsontheweb.net/ctet_previous_year_question_paper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/ihZ1jsP/disuwobexiresod.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/tDDQ5ge/valkyrie_profile_lenneth_psn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifedisiso.atwebpages.com/wirekav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9d5912-a806-4749-b167-9892365ecd13/how_to_become_medical_lawyer_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e11c1bf-ac31-475a-88c7-d8c56464f32d/funezelimusugigesujiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4f09fe-f6c8-49f0-b733-c2c59963e1f2/metal_gear_solid_2_substance_ps2_cheats.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_2b050b6d2ebe43a59881bdc4072f5f24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bugutaj/60276708211.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/47499286188.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/vunudosisidi.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_e7208ead0d8e4d37889aa56287ba7950.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozifep/vituxu.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_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 5428 bytes
SHA-256: a40c5471967a4fca81306df2d96c74c394592b7f2cbd44d20ee8540c860b89e0
font_01_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 12992 bytes
SHA-256: b908c68e3498a4d966965ea77a9e2cf7893ba9e11a90b32b7ebacaa678fa7d17

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