Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0be8dd7b1ca2864…

MALICIOUS

PDF

77.7 KB Created: 2021-03-13 14:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d7e7ca7ae9049403a46f9b5385e0123c SHA-1: 9deb059fa4b7a5f218a4ca6389a292aa7a47a4c2 SHA-256: e0be8dd7b1ca28644826dd2cfb4c96fe95b1166823637e15ae696f08d7cf88c9
126 Risk Score

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 0.9998

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://jottigo.ru/strik?utm_term=how+to+make+a+calla+lily+paper+flower PDF link annotation
    • http://emirofficialzm.com/talk_to_me_in_korean_workbook132yn.pdfIn PDF document text
    • http://farvestnn.ru/71244335384yuoi6.pdfIn PDF document text
    • https://dajikapepexav.weebly.com/uploads/1/3/4/5/134597014/faa8beb864.pdfIn PDF document text
    • http://drenajkrasnodar.ru/9243566028yzbih.pdfIn PDF document text
    • https://mupilikonibiz.weebly.com/uploads/1/3/0/7/130740066/5c70a951e696e1e.pdfIn PDF document text
    • http://lightly.store/a_lesson_before_dying_full_bookl45oq.pdfIn PDF document text
    • http://shop-onlain.fun/drivers_para_mini_laptop_acer_aspire_one_d257_windows_7yqwlk.pdfIn PDF document text
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/433f20e926b.pdfIn PDF document text
    • http://msertis.xyz/sawewofozufafebajidopozp0fl.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/salunumaxemamudasosixedok.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/ffa5f8007eb9d5.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/what_does_free_will_mean_in_religion.pdfIn PDF document text
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/gukurubatoxaxe-revaxasev-ruvilam-vamusonujo.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
    • http://futikuzita.onlinewebshop.net/how_to_start_working_out_at_the_gym_for_beginners.pdfIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_3807002d22fa42388f4f9a708cb3d473.pdf?index=trueIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_d6257eeb1d3e4ae69ed91dd3fbd5726d.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_9ff6523206984d11ac086de05a781616.pdf?index=trueIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_b48e69e491944837bd0156c7f7f0541d.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_off0000e69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 4884 bytes
SHA-256: 846366ecfeff9b076973eccbf6054667c8a792afeb5c63e183bbfb49abc28e1b
font_01_sfnt_off0000f750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF750 10604 bytes
SHA-256: 4afe68dd837cb7293f8a1a15c18d41611ae095b1ae6b23d6937cdd3a195e22c3
font_02_sfnt_off00011b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B44 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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