Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9c24cce995fd2b…

MALICIOUS

PDF

89.4 KB Created: 2021-03-07 15:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0b5363a67c8c4e3bd12e71955228e191 SHA-1: 1c94ee08e080800746e49e36c9f8174fb26e1745 SHA-256: 5a9c24cce995fd2b9c2bb75aea8958aa8f24b0373679113e4f0dce5dd29ce180
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary embedded URL, 'https://midufefew.ru/wix?keyword=avatar+the+last+airbender+crossover+fanfiction.net', is presented in a way that mimics search results, likely to deceive users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=avatar+the+last+airbender+crossover+fanfiction.net PDF link annotation
    • http://pukebebizadolu.mypressonline.com/i_am_that_nisargadatta_maharaj.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/vizinofalaku.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/radolujalevogude.pdfIn PDF document text
    • https://xipejefokodidub.weebly.com/uploads/1/3/4/6/134612454/7682400.pdfIn PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/dezatixof.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/el_lazarillo_de_tormes_tratado_1_la_venganza_analisis.pdfIn PDF document text
    • https://dajusokododolin.weebly.com/uploads/1/3/5/9/135964726/b2f0d9c5.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/william_blake_is_best_known_for_two_poems_the_tyger_and_the_lamb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_7e5fcb7be9984607b54b3d3b0404528a.pdf?index=trueIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_0c2312d025fd4843a5bd209b6fa477a7.pdf?index=trueIn PDF document text
    • http://lujifub.epizy.com/interview_best_answers_tell_me_yourself.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_d537b5a71b694914a7ccc6ba9a0d0559.pdf?index=trueIn PDF document text
    • http://lefumes.rf.gd/yakuza_4_nair_guide.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/rumi_books_in_english.pdfIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_910ecb3feeb04afabbc5c41047ac4bde.pdf?index=trueIn PDF document text
    • http://belibivizonojo.myartsonline.com/paguvepexogevapuwep.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_e4647dea190b482dbdea24ebc812f551.pdf?index=trueIn PDF document text
    • http://resilasijajatil.myartsonline.com/mewusug.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/vejerisazaw.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_off000122e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E6 5328 bytes
SHA-256: c3123dc8ac0155c76a3798bb9b23cd67287b2486de9ed914c38b5c76806afea1
font_01_sfnt_off0001350b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350B 10260 bytes
SHA-256: c07a39ce6b335add22cbd52c979bd642016775d8f10d81a47b0345418ac10ac0

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