Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe65f8909db95e71…

MALICIOUS

PDF

80.6 KB Created: 2021-03-28 02:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: be3e29591780fa8ff5f29c2229e50cdf SHA-1: 608254ff54bca9d05b50908b0d926ed99670fcb7 SHA-256: fe65f8909db95e7153ee7b1762063d077a53d9fa1d5f2bd3e1075d10ddfe2c0d
186 Risk Score

Malware Insights

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

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 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=into+space+xmas+unblocked PDF link annotation
    • https://cdn.sqhk.co/bovokolel/bphb0hj/the_siren_voice_on_head_exist.pdfIn PDF document text
    • https://cdn.sqhk.co/kazakilen/ghdY1mu/quran_audiobook_english_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/ihjcjak/princess_pixel_art_sandbox_color_by_number_drawings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fd787338cb11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417208/normal_5fd88086607e3.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/84oih9X/16496624251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_6053bf24297d6.pdfIn PDF document text
    • http://lg-copyright.com/4326641262z6u15.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/Biashih/lightroom_mobile_presets_tutorial_step_by_step.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_600c1bbabf784.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/5qii9gi/steel_pulse_true_democracy_rar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_6049cbaadba08.pdfIn PDF document text
    • http://powerhdniy.space/free_pattern_making_books_downloadhqrzz.pdfIn PDF document text
    • https://cdn.sqhk.co/rurewemanavi/hshchg5/lubunebexixiz.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/hdoKji1/kewunolasotawizixefuxe.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://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_deed6e75c2ee4a9aaa8f1684986b7e90.pdf?index=trueIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_b34eff7978044b49ab313dbb3c565947.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee099719-2dff-4fe7-a4e2-8507e9a642fd/how_to_calculate_volume_of_cylindrical_shells.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/849058dd-7a6a-4315-b3f6-a16f17e307b1/mawotines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365d018a-4159-49f1-a919-523b6e43ca91/thesis_statement_examples_for_obesity_essay.pdfIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_e42d7d26e94a4f8fa897183a30926933.pdf?index=trueIn 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_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 5168 bytes
SHA-256: 527af78b44959231b78f5249c3eb0ee07c291ce552e30d89d0f6dd88882fba0d
font_01_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 12744 bytes
SHA-256: 40e86ceba83b0fa6252507f4eb7a974260678ca6688e169952640a16049fcecd
font_02_sfnt_off00012698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12698 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34