Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9f70afaa0b43c8…

MALICIOUS

PDF

72.8 KB Created: 2021-03-09 21:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cda3e38dcd70da02c9a2541cb41ecd9a SHA-1: 9ff1a51a29792b6284c26409ae3ea1d4b3efcdaa SHA-256: 8e9f70afaa0b43c8cf352ec5ec62c898e6b0b84be988b1fd15beca81f7a05117
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to various disposable hosting sites, with one prominent URL being https://jottigo.ru/strik?utm_term=inferno+di+dante+gole+alcantara+2020. This pattern is commonly associated with phishing or malware distribution campaigns.

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=inferno+di+dante+gole+alcantara+2020 PDF link annotation
    • http://kigaruzolalo.mypressonline.com/xazuladakajorisamemopo.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/how_to_love_thich_nhat_hanh_free.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/87845074358.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/an_ember_in_the_ashes_movie_adaptation.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/wegimo.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/70219591563.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://rimamosapike.epizy.com/20708842678.pdfIn PDF document text
    • http://buvuvutokitiz.epizy.com/78443866950.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_a4c9215d032d4483808338eff55b1aa1.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_df119b04c8a642d79c717ca676429b68.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3005a2b1-ecda-4f33-85e4-1e501b884b0b/imaginative_and_realistic_difference.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_68aec679b79345e281a8685d7633f131.pdf?index=trueIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_86f5230d05fc43d4a9e5a62ea0323ac8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/983a617b-03ac-4e9f-8f67-5a04ece0ead9/super_mario_land_gameboy_level_4_3d.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_567da0199129481d9ba81efe6f27411a.pdf?index=trueIn PDF document text
    • http://gakilasefit.myartsonline.com/sofawafuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe74f57-70c1-4840-8169-d5f11fbde8b3/lost_the_shape_of_things_to_come_reddit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7D 5008 bytes
SHA-256: d753257cbeb8d8da5cbaf4e55a8565a74f84770576193e0a2156e323b13c8d32
font_01_sfnt_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 11780 bytes
SHA-256: 337cb877a5cbf61eced506a7385d626c552d0e15c12ec4d32f768daf57afa3a5
font_02_sfnt_off000105f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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