Malicious PDF — malware analysis report

Static analysis result for SHA-256 e827581d276bee82…

MALICIOUS

PDF

75.9 KB Created: 2021-05-06 13:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e028e383bd01895025a6c4d29a83dc72 SHA-1: b81fa8bace45640325514ac1f333bb5a65428053 SHA-256: e827581d276bee829c91c4f553c0202b2f2408c7d945bc33889f35b93ab0aebb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous external links, including a primary URL that appears to be a redirector for a search query related to drivers. The document body, though heavily obfuscated, suggests a pretext for downloading a file. No scripts were extracted from this sample, but the presence of many external links and the phishing-like content strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=dell+1320c+driver+for+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499651/normal_6003ee2536574.pdfIn PDF document text
    • https://moxuwurenawa.weebly.com/uploads/1/3/0/8/130874588/jiwefijejip.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/94c073afe44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474736/normal_605282325daa5.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/adeste_fideles_partitura_coral.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392658/normal_5ff5a94f115ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_60464209dc139.pdfIn PDF document text
    • http://com-servers.online/are_samsung_washer_and_dryers_good_redditetrvk.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/the_old_man_and_the_sea_plot.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/anaximenes_of_miletus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477620/normal_5fedfa35ee790.pdfIn PDF document text
    • https://nolalitikobuno.weebly.com/uploads/1/3/4/7/134768790/7686306.pdfIn PDF document text
    • http://beautysss.site/ninja_supra_kitchen_blender_system_with_food_processor_bl780_black_fridayzw9cq.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/2f516475-2590-4835-af3a-bccaf3cf5714/97643832427.pdfIn PDF document text
    • http://titugol.atwebpages.com/navy_medical_corps_incentive_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cf07b5-38ec-404b-a7e3-ac109b60b2cf/united_states_army_address_for_resume.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/kaworadonovedevexunugale.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/bible_english_hebrew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27df81d2-9034-43a2-b327-1baecfd1bfbc/roku_2_remote_not_working_no_pairing_button.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/calendario_escolar_2020_andalucia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898ba2d5-3c26-4e6d-b9f6-423927d4cbf7/degarinarimifawapu.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_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 5448 bytes
SHA-256: b5838c2f21c34bf4b09c25822cac8ce50a3c748c2dc47a8afbcbff11b80a2f64
font_01_sfnt_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 10504 bytes
SHA-256: 224e9ff68e04fa5a83801d460d8536a61d89cad38dd3293ec7217b1de65cc926

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