Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55bbf8e143e56c3…

MALICIOUS

PDF

74.8 KB Created: 2021-03-23 00:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 834497425de39b3d0a900b91f5f9897f SHA-1: 292028677b95c8bafc54d18174e1c5780b086791 SHA-256: e55bbf8e143e56c3c0e7e796a81de97f8442adf7a1f02ebcce6e5e58d2d157f8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs and a heuristic firing for a 'Payment redirection / bank-detail change lure', indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://resalured.ru/123?utm_term=avira+antivirus+free++computer PDF link annotation
    • http://zeropium.com/ascendance_trilogy_book_1ifir6.pdfIn PDF document text
    • http://opencabinets.xyz/12917474620zt42m.pdfIn PDF document text
    • http://procripton.com/watch_despicable_me_2_online_free_enz87wg.pdfIn PDF document text
    • http://sluzhba1.net/best_free_online_digital_photography_coursekw13u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_6052b54e41d98.pdfIn PDF document text
    • http://vkysnaya-eda.site/519961740609feo4.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/idogicf/glowing_live_wallpaper_cave.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/w3wqjc1/download_battleground_pixel.pdfIn PDF document text
    • http://reestr.site/32699358008ihxc4.pdfIn PDF document text
    • http://cozyplacefor.rest/25255360450hk832.pdfIn PDF document text
    • https://cdn.sqhk.co/badexejos/moxugcU/free_solitaire_for_android_tablet.pdfIn PDF document text
    • http://wei-nmvc.com/75807179632va5q1.pdfIn PDF document text
    • http://probmake12.xyz/knight_brawl_hack_downloadl21by.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/wfxskij/mopogolimadodelururu.pdfIn PDF document text
    • http://kinokaiff.space/leaf_nosed_snake_care_sheetgv5c3.pdfIn PDF document text
    • http://trackengine.host/65633586010velm9.pdfIn PDF document text
    • http://axacheat4.xyz/is_the_worx_trivac_cordlesscddkd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_5fe8aa92006e4.pdfIn PDF document text
    • http://idealica-co.site/folowowobupufej097y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_604ca81a56f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463266/normal_600e5f0a61707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_3c2655734597444d96df9f2177fce08d.pdf?index=trueIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_ea7a2ad632064be6a7d271813441e0f7.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_dd358948b5fb47a094a7e5e5739e4983.pdf?index=trueIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_e0535213a0434156a7138e37db008133.pdf?index=trueIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_7457544442f54c76b9896d98219b2599.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 5180 bytes
SHA-256: 1d0a11243dedcf0d81b9284b10c9dcc0edb81eb5a84e2613ffa7455742bbbeb4
font_01_sfnt_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 11284 bytes
SHA-256: 34923e0b0319d2e25f9c15974ad6113d913b378f5c1cfabb1aac0bd6cdeaf119