Malicious PDF — malware analysis report

Static analysis result for SHA-256 159bb193187eb506…

MALICIOUS

PDF

89.4 KB Created: 2021-04-01 09:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 91d4df167e28e85dc019f77b4a9a36df SHA-1: 433754a19714f7c2b8c257e028667f18418c83ff SHA-256: 159bb193187eb506e41e1881bd14bd3f54cad9cb16e00ed731ea65002ffd6092
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, identified as a link farm on disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to a popular game, aiming to trick users into clicking the malicious link. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/award?keyword=warhammer+40k+daemons+codex+pdf+8th PDF link annotation
    • http://talerexogite.iblogger.org/fezagamojiremosigiropetol.pdfIn PDF document text
    • http://kuliwegi.sportsontheweb.net/piwavabuduv.pdfIn PDF document text
    • http://pifovabu.getenjoyment.net/focus_on_ielts_new_edition_answer_key.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/hospital_waste_management_ppt.pdfIn PDF document text
    • http://babusokojanog.sportsontheweb.net/best_south_indian_food_for_weight_loss.pdfIn PDF document text
    • http://gidonuvawugirid.medianewsonline.com/spanish_food_vocabulary_activities.pdfIn PDF document text
    • http://tejaxoxedagu.iblogger.org/tobiwakezumudokasubopun.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/e215febb-5602-43c4-bc4b-88fc832f193b/marantz_sr5007_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398b6606-5c81-4c40-9431-157deb6217ad/cfa_level_1_topics_weightage_2021.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/kanedadigiduguki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1887be-79d1-499b-89f0-7e696c09b86e/19190116338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e5db89-7c7d-4c09-8da3-1d11c0cb113e/70347629391.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/kuzofavuvupipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451012a1-3305-49c9-af7c-63a965dfd444/how_do_you_get_an_average_of_an_average.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74024ba-aef9-4fc9-adcd-75d7231b3e50/blackburn_trakstand_ultra.pdfIn PDF document text
    • http://lerumedinopox.onlinewebshop.net/fudozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b59140d-fb84-47cf-8b18-64e9902ad59e/karcher_pressure_washer_pump_2400_psi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19a6347-7a71-4b70-9828-652803b03c4c/how_thick_can_a_lincoln_140_weld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd53e6d-c082-4102-a5e0-217c31393cf0/zoxituzetaj.pdfIn PDF document text
    • http://tiborumaroxotob.rf.gd/autorretrato_sin_mi_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f3303e-899a-4959-9c94-09f819fe2596/what_is_the_meaning_of_terminated_due_to_timeout_in_hackerrank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014ddde1-5dce-477c-835e-7eb22ca6a025/big_data_analytics_salary_in_chennai.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_off00011e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 5932 bytes
SHA-256: a3b4764e75b0da62ce6d029ee90fcadc4456d4fb09c0b1412539442f23009797
font_01_sfnt_off0001327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327D 11164 bytes
SHA-256: 8e74b97dd4634fb0c4c7073d8bedffedc29876d5375a8829f5d3fbeb56589adc