Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d4c38b14d6d7ef…

MALICIOUS

PDF

87.0 KB Created: 2021-04-29 02:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d140ca95081cbe191022fea2ae952bd SHA-1: 16de0608966354bdc5b87f4b1104d42d4014ca44 SHA-256: d3d4c38b14d6d7ef371a6cff4f4d177a6dcd20ab9857f7550a5f543a51e8f687
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/strik?utm_term=samsung+rfg297hdrs+door+shelf PDF link annotation
    • http://popisazono.getenjoyment.net/applied_statistics_analysis_of_variance_and_regression.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/how_to_connect_bluetooth_on_jvc_kd-s79bt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_6039d5603c4f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_6018517dbe6b1.pdfIn PDF document text
    • http://nipawifaxupus.mygamesonline.org/manual_de_frases_basicas_en_ingles.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/91368007899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_604d45589bd6e.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/ejemplos_de_aditivos_alimentarios.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/bendix_brake_pads_catalogue.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_61ac9800aa9c40c3b0adfd254e7b90a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7faf5e-e051-45ee-8019-a144dfdf5e04/what_are_the_best_silicone_wiper_blades.pdfIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_eadbd463f058447e86b621269345d4c8.pdf?index=trueIn PDF document text
    • http://lugimeviguv.myartsonline.com/pdf_to_ms_word_converter_for_pc_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef5d2dd-a50b-4aa5-afa9-0cd832cf4309/how_to_detail_my_car_interior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6e5ae4-c700-4203-b40b-61d030b6f71c/metodologia_de_la_investigacion_4_edicion.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_1b6a346c96664fb182c9d4f4370c6395.pdf?index=trueIn PDF document text
    • http://tososite.onlinewebshop.net/teacher_attitude_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/69761712247.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_fdabe489a4e34f4e965e8ea1549bc887.pdf?index=trueIn PDF document text
    • http://jumepenitujox.atwebpages.com/lelebopupagukitof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c10396-976c-4c7b-aeed-b06e288538e6/24261140501.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/astro_tech_lc-_2_quartz_chronometer_manual.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_off0001182b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182B 5792 bytes
SHA-256: dd3053239a08058f5b5f1edc670909cd16dfc83faee8f97c4872754cb19d8e91
font_01_sfnt_off00012bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBC 10340 bytes
SHA-256: 623ad9cc2fe1163f3c18926c0e89e3dfca9879262b2f31b1a0cb1344d2fccc58

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