Malicious PDF — malware analysis report

Static analysis result for SHA-256 4792c01b88f7dd4a…

MALICIOUS

PDF

80.7 KB Created: 2021-03-22 20:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b63c7394cfe74c073dd87aa599219dba SHA-1: b97bf4995c07caf3a4fab8f1e0d5e33ce92235ca SHA-256: 4792c01b88f7dd4a578f2e42aa60b3f9076e78b6d3aa7f22f5e67b07638d7b01
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 0.9997

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://nipisod.ru/award?keyword=action+plan+meaning+pdf PDF link annotation
    • http://options.expert/les_cellules_sanguinesp12vv.pdfIn PDF document text
    • http://regsenatvumen.website/697276432333jwhg.pdfIn PDF document text
    • http://eurosett.net/lopososutosidapeguv1uv.pdfIn PDF document text
    • http://ueuniti.xyz/what_stopped_open-range_style_ranching6f31u.pdfIn PDF document text
    • http://furniture21.online/zojalazuxagibavipusus9cfeq.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/600373029.pdfIn PDF document text
    • http://all-system7.work/finding_angles_in_circles_common_core_sheetsbiizt.pdfIn PDF document text
    • http://zubiki.top/rational_expressions_worksheet_multiplying_and_dividingpquwt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_6cc7760d309c45f4872f63722cbaaede.pdf?index=trueIn PDF document text
    • http://sutexuvidag.myartsonline.com/pokemon_emerald_walk_through_walls_cheat_codebreaker.pdfIn PDF document text
    • http://vegubom.atwebpages.com/a_level_chemistry_paper_5_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/mopitugagogolomutabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/882a3980-8521-459a-ba04-dae6e5f69aba/39905278577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4cb0c32-c026-43df-944c-20bbafb160d8/shooting_an_elephant_commonlit_answer_key.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_ab7ae38507b94ee2b4e17c9692baea57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/400918f5-4a2b-4cdd-8dbf-31cee424da62/83353945381.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/16418108109.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/salesforce_lightning_design_system_developer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/biblia_de_estudio_para_mujeres_gratis.pdfIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_b339928135c4469f8633712c6ba580dd.pdf?index=trueIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/59444807674.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/clear_search_history_android_internet.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_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 5192 bytes
SHA-256: dfd34225b6783ea8b516747b167ebb4a9443d5a88c082bee191716b393140989
font_01_sfnt_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 12280 bytes
SHA-256: 07b7071bb4b8f3516c8a8b04d839542400a970102d35335ccb08be8c69730dc6

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