Malicious PDF — malware analysis report

Static analysis result for SHA-256 6780ebe971c275c3…

MALICIOUS

PDF

78.8 KB Created: 2021-02-19 14:26:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8ffdfd380dd2837022ac201147c409d5 SHA-1: 86b0ccc7883363f1430df7add8edba11de148cc6 SHA-256: 6780ebe971c275c3973c7b35451c5b63e7b379842c2da051943e93748eb8e2df
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The document body text, 'Cuanto es 3/4 pulgada en mm', appears to be a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=cuanto+es+3%252F4+pulgada+en+mm PDF link annotation
    • http://godevibusaxinoj.22web.org/lovobosejir.pdfIn PDF document text
    • http://all-casino.xyz/52712100672ob23c.pdfIn PDF document text
    • http://kuzamejeluwezik.22web.org/53815967519.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/hdcijj9/prospective_student_tour_texas_a_m.pdfIn PDF document text
    • https://weraxugunelega.weebly.com/uploads/1/3/4/7/134719696/winivovi-wevefovazozilo-kinewetisimo.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/36073322841.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/ieFidqv/21601022656.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/fatugowelonojobawexug.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/gThd8hc/21342140597.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/ihdge6A/77975056443.pdfIn PDF document text
    • https://fijitedutim.weebly.com/uploads/1/3/1/1/131164269/934273.pdfIn PDF document text
    • https://jowanubeso.weebly.com/uploads/1/3/5/3/135399775/6287912.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/c0jatjj/ball_sort_puzzle_level_504.pdfIn PDF document text
    • http://chemistryplus.space/history_of_russian_folk_musicv5yy1.pdfIn PDF document text
    • http://hamlikjorettoop.ru/how_does_a_wire_transfer_work_internationally3usvu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zatorir.epizy.com/10933984671.pdfIn PDF document text
    • http://vogojitipam.epizy.com/free_alarm_clock_app_for_pc.pdfIn PDF document text
    • http://fubegamo.epizy.com/personal_information_questions_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF64 5376 bytes
SHA-256: f4f708a7e2f5c1109f24afe3196fa1d699bb41908d00c8cfe8af96055bf97e78
font_01_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 11420 bytes
SHA-256: 24f94ab9294ae94e4e82f9c03fad7bb5d8661237f11686d3a7bf909ce6c7d99d
font_02_sfnt_off0001173b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173B 16100 bytes
SHA-256: 9e9cd3e823d2b2c43597f4611ab9b63d40ea3e1a9eeb22e83fdae90966f5e152

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