Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da923f921ef86d0…

MALICIOUS

PDF

76.1 KB Created: 2021-04-19 04:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bcc926093e0100614b007a82a434d0c3 SHA-1: 2253f094a90441f9896a64a8d4d3da6b15400b55 SHA-256: 9da923f921ef86d02c9947cfddf7b985f5f7f6fe7447c24e1decd3dbbb4b0773
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains numerous external URLs, with one prominent URL pointing to 'midufefew.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to psychology, likely used as a lure.

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://midufefew.ru/strik?utm_term=what+is+an+example+of+projection+in+psychology PDF link annotation
    • https://cdn.sqhk.co/tibapopedeka/jfiibOH/95899789077.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/y4jejgq/ebook_adestramento_de_ces.pdfIn PDF document text
    • http://xopaberowiwin.getenjoyment.net/40119913520.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/9gh9Ngi/harga_vibration_meter_fluke_805.pdfIn PDF document text
    • http://mebotus.mypressonline.com/dujavodadesuxubur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_605402669c50a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_6028227ed0db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476601/normal_602ff858aa814.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokofapig/maximum_principal_stress_criterion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6db737-1679-4227-8332-22ebe89714bc/yamaha_moto_4_350_tire_size.pdfIn PDF document text
    • http://zalolod.epizy.com/63849650121.pdfIn PDF document text
    • http://netupizorazez.rf.gd/may_might_should_ought_to_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/18700290241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ec48ab-fe29-49fb-86e0-7d5ea4f39d9a/ritetemp_thermostat_8022c_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/pitilijapujebatafe.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/mental_ability_test_questions_with_answers_in_english.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/how_to_get_tiny_knots_out_of_string.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/84031054522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87eb6ab7-ee87-4ced-9307-622db38bf60e/how_can_we_prevent_social_engineering.pdfIn PDF document text
    • http://delixerilebuk.epizy.com/electrophysiologically_guided_antiarrhythmic_therapy.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_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 5688 bytes
SHA-256: eda592a978f5f1d9d8c35cae2e2eb64561ba3cc201d92027136660f58ebf5d7c
font_01_sfnt_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 10488 bytes
SHA-256: 788f654660a36e6e8a5afe421f6a9e9f705b3a9e58afe05a0a1800091b87ca07

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