Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac4b92c46eace65…

MALICIOUS

PDF

76.5 KB Created: 2021-03-20 10:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5d01ed31dae83eda7014e48a13d8e76c SHA-1: 486bd9067cf5d2d9a7961ec54e86b0a8f21f4a9c SHA-256: 4ac4b92c46eace65956b53a982fc5a7b79033d673a658a1d903a0a09a8429d2e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure to trick users into clicking the link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=uvi+aquaponics+system+pdf PDF link annotation
    • http://sewakasatixori.medianewsonline.com/92784612956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_60145e05ee5b9.pdfIn PDF document text
    • http://beguwidip.scienceontheweb.net/wedak.pdfIn PDF document text
    • http://vuxiparami.22web.org/marine_microbial_ecology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494431/normal_5fdba8ed80961.pdfIn PDF document text
    • http://vejofewi.iblogger.org/kitamazevopevuraked.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/building_collapse_in_new_orleans_address.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_5fd1dad0cdf81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sobaketemu/90625928492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d9b660-8505-40d5-866b-11a4926556eb/97914970318.pdfIn PDF document text
    • http://reladefuxuna.onlinewebshop.net/27767776231.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/23335582673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd713adc-f0f5-4f79-828e-9f8125baeb27/what_are_the_al_anon_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/ccrn_review_questions.pdfIn PDF document text
    • http://keladuwuk.rf.gd/how_to_set_alarm_on_sharp_clock.pdfIn PDF document text
    • http://kizufalugomux.atwebpages.com/ukulele_chords_free_download.pdfIn PDF document text
    • http://xodolipifonabo.epizy.com/fashion_marketing_and_management_online_degree.pdfIn PDF document text
    • http://gimazabovatefik.epizy.com/does_the_catholic_church_believe_in_free_will.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/wiwiserotoxo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 5332 bytes
SHA-256: 141fd9b826ef4e9d5cf96b7ff3867bf961fd413b851b59c528ad0c90a14d6d1d
font_01_sfnt_off0000f38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38F 10148 bytes
SHA-256: a73bdf1a83444c77799a34f895eb3c139f23e66a04b53265db3af31c94f99617
font_02_sfnt_off00011638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11638 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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