Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e342ba92c0f9f9…

MALICIOUS

PDF

78.3 KB Created: 2021-04-30 20:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e3e9110b892ab392998d2d4fe788574e SHA-1: 7edd2714fe9f7d7436c2592d535c594f350a2291 SHA-256: 26e342ba92c0f9f93154b1ffeaf55b8d17eeb374d3b00f978922921da28c2115
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to phishing or malware-hosting sites, likely leveraging JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=subliminal+seduction+book+cover In PDF document text
    • https://rofajubufilotol.weebly.com/uploads/1/3/1/3/131384128/6c559ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_5fdd98665006f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_6007b2e63fa5c.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/vexifodilurej-rusixalefugulel.pdfIn PDF document text
    • http://agent-spv.space/how_many_pages_is_the_shining_bookh107m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_6038edb940572.pdfIn PDF document text
    • http://sendgrid-de.com/internal_audit_interview_questions_and_answersja528.pdfIn PDF document text
    • http://walotapedaz.iblogger.org/learn_the_2020_advanced_python_programming_free_download.pdfIn PDF document text
    • http://fawetugamuxix.66ghz.com/2002_buick_rendezvous_repair_manual.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/tezaxur-denatazexiseva-supuji-nepimodolopuf.pdfIn PDF document text
    • https://tuwakunasuj.weebly.com/uploads/1/3/0/8/130874309/fusob_jepoziburuda_relupas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5ff3fe2de1dce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakezemafatelo.epizy.com/alginatos_cromaticos.pdfIn PDF document text
    • http://lelekon.epizy.com/voximaxiw.pdfIn PDF document text
    • http://refewebol.epizy.com/comedy_hollywood_movies_in_tamil_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0547b97d-dd62-48e1-9c00-10d27f0b68b2/84593294071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee8022f-3041-4057-bc72-3d9e9316d048/urology_procedure_cpt_codes_2019.pdfIn PDF document text
    • https://0633afab-057d-4448-85e1-ac1a97571725.filesusr.com/ugd/66920c_04c9cf232ae840b8b6a138f01452de2f.pdf?index=trueIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_842443fea3e748ca84b845836ec20cf1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73cf58a-8129-42a3-83d1-5a8ac0057908/63981893410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76b6282-290e-4a15-9f10-9dc88f77e6ad/echo_pb-250ln_25.4cc_gas_powered_leaf_blower.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_3b7e1dd76e4241c5b473f22c02807bf7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3ed117-bd5f-4321-805e-f14d40e3490b/46649996102.pdfIn PDF document text
    • https://502e425a-54a0-4661-a3e6-c6e116bdb13d.filesusr.com/ugd/10da26_6fbd5ad8660d401dbe1cfb517c6fabb3.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_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5452 bytes
SHA-256: 839e5609dfd9d584a5f48547f6d7d1e0c1a8e733b8bfbd3b62b891a73d4b0c3c
font_01_sfnt_off0001036f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036F 11744 bytes
SHA-256: 573a35963119c70b873e070df3d4a35f21a85993dd5dbb227a7d8a29de6b8a5b

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