Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e447c65eb55f44…

MALICIOUS

PDF

77.1 KB Created: 2021-03-14 01:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4e6599c8ffb1cae281933038ab20fa2a SHA-1: 2661b9a00415cac0e5e60282c02fddfdd7a2b14d SHA-256: 23e447c65eb55f44f63b1c3b25757d8a7d6b6dadbb9fc26a33f8f2222df58a6a
134 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs, specifically 'https://resalured.ru/wix?keyword=movie+tube+apk+2019', suggests a phishing or malware distribution attempt. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick users into clicking a download link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/wix?keyword=movie+tube+apk+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419225/normal_602f6b56d1a36.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/lisukanokirupigomapowena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5fc9b6776231c.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/assignment_operator_in_c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_6025badda56fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_6014bd41801f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_600189f90f935.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5ff69625c07ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_5ff41422c9951.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/surah_mulk_sheikh_mishary_mp3_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_600fc0ac3f05e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_600c3d3293e96.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/reproduccion_de_las_angiospermas.pdfIn PDF document text
    • http://zowogusatutojus.mywebcommunity.org/vezixumafupimarasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5fdbda7749431.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/nursery_rhymes_for_babies.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/management_information_systems_managing_the_digital_firm_16th_edition_amazon.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/612e7b55-f976-41b0-8cb0-d3ccdae7223b/85832501426.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/shadow_work_journal_prompts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0040c93b-ef20-4cf3-8a81-04e40b6d012a/message_to_garcia_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fb368d-8224-4b2a-90bd-bea664f5399a/xegobe.pdfIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/26235184079.pdfIn PDF document text
    • http://pebomotixot.myartsonline.com/one_way_anova_using_spss.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/how_to_use_a_charter_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8592e96-84f7-4e12-83e9-0f8a6dd6d219/fikupiwurufat.pdfIn PDF document text
    • http://pekamidakoj.atwebpages.com/magnetic_curtain_rod_for_wood_door.pdfIn PDF document text
    • http://tevaluzax.atwebpages.com/jaketi.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_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 5256 bytes
SHA-256: 1b5132899feb10b1b483afb70493431cc70dcc273a638e68a9ada4af19a0b16a
font_01_sfnt_off0000ec2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 12104 bytes
SHA-256: 39007ba8e73834c6708c8c7f645e3446678c60b2c5f13a41fd1c2c0b8bdd85e6
font_02_sfnt_off000111f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F6 16068 bytes
SHA-256: 5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8