Malicious PDF — malware analysis report

Static analysis result for SHA-256 8512e7e08404aaa2…

MALICIOUS

PDF

81.4 KB Created: 2021-03-16 18:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b56ba2edc69caf4a1bca1256388041a9 SHA-1: 5be5e42e2fa88758d1f8fc28b116e858593151d1 SHA-256: 8512e7e08404aaa2bad713e4408489aa8ad0d565c7f50fc300c0d6762425d00e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely serving as a lure to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://pelibifir.ru/strik?utm_term=shell+script+if+statement+multiple+conditions PDF link annotation
    • https://cdn.sqhk.co/wixefawoz/lgejdxv/69042500721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_6029846c9e985.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/koratatipu.pdfIn PDF document text
    • http://mebesovinu.22web.org/weather_report_jagdalpur_cg.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/VjemZjf/motorcycle_wallpaper_iphone_11_live.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/VZkQib8/moneygram_customer_service_number_in_egypt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_601d9a2a61401.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/eg4hjji/the_last_stand_union_city_hacked_unlimited_everything.pdfIn PDF document text
    • http://wofoweniwer.iblogger.org/bezuxebu.pdfIn PDF document text
    • https://cdn.sqhk.co/pexudolifa/3Hih7Gt/50154853704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5fcdc47aefac9.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/1e0a527e-aef8-48c2-8b4a-adc03eda6651/xexifigabitobaxexawuk.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/85723951157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401ab86c-2952-4dde-a49a-56d6dcc9edde/weguzirowefujewuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2baa1b7d-0ef4-4581-baf0-0ef57eb6191e/noco_genius_g750_instructions.pdfIn PDF document text
    • http://teboseru.rf.gd/elements_of_applied_bifurcation_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2962c86b-3094-4abc-98ae-40f8b1421517/vitamix_vm0101_parts_list.pdfIn PDF document text
    • http://redanewirejawub.epizy.com/mevozapigavun.pdfIn PDF document text
    • http://nakixaxev.myartsonline.com/adobe_acrobat_writer_free_download_for_windows_xp.pdfIn PDF document text
    • http://gevuwomomot.epizy.com/axis_companion_cube_l_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e96f7fb-f394-49ef-8e06-da34fa5bf06b/fesosujilomi.pdfIn PDF document text
    • http://runuwug.myartsonline.com/66000372834.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/android_tablet_10_inch_64gb.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/lisaduzojosupesuzemobos.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_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 5500 bytes
SHA-256: db02fc3ff8d55c91f9a8182fad861f8b11eaffcf6a7db3b68b70bb729bcca8dc
font_01_sfnt_off00010ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE9 11788 bytes
SHA-256: e56f7a41512b9b444072f86bd48d9158272a9ed4fa78cd799aab8a3a01bc474f

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