Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c56f1d7d94a1a8…

MALICIOUS

PDF

71.7 KB Created: 2021-04-25 00:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2118ff56f6ed539a7e6eaf868f0339a9 SHA-1: 57473674968b726cc8a90371a3de7f6c08b6a1e4 SHA-256: 27c56f1d7d94a1a82162c652ca7d264772b5c379950742e3b5e450be7fd75cde
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://crophysi.ru/strik?utm_term=sangean+america+rcr-5bk PDF link annotation
    • https://cdn.sqhk.co/jaxofudaz/Q7jjhga/7809511124.pdfIn PDF document text
    • http://weviwoza.22web.org/letter_of_authorization_with_notary_template.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/icao_annex_2_download.pdfIn PDF document text
    • http://manovina.mypressonline.com/authoring_autism.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/Z1jhnun/wugibuti.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/O2Riaha/54084486077.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuwozelob/if4hegg/lilogivipigisi.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/paradise_lost_book_9_critical_analysis.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://motakajukig.epizy.com/bokemulebizu.pdfIn PDF document text
    • http://fokuxukidedir.rf.gd/zewisirebewob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bd2f5e-8c02-4b4e-b859-629856f52760/samsung_ue32eh5000kxxu_spec.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff98defe-81cd-4eb9-ad8f-47e46235bfd4/how_to_calculate_log_base_10_on_scientific_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae501d6-2b83-4a69-b509-95d9b5f65db4/how_do_i_fix_the_latch_on_my_ge_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72b5584-aedd-41f0-8ed7-e47dc7268974/gusiwajod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae298bbd-c43a-4712-8141-fc729c8feb71/a_voided_check_means.pdfIn PDF document text
    • http://xezarimupesekal.rf.gd/paleo_lunches_and_breakfasts_on_the_go.pdfIn PDF document text
    • http://benepuru.epizy.com/east_windsor_regional_school_district_salary_guide.pdfIn PDF document text
    • http://midejoxujonaler.rf.gd/wordpress_get_installed_plugins.pdfIn PDF document text
    • http://loxexezusus.rf.gd/pigikugedilorawakaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb098784-78f3-4ed1-9930-e0aabd7ecbc0/the_future_progress_of_the_human_mind_summary.pdfIn PDF document text
    • http://misibinebob.epizy.com/zopadag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f000fa-72bf-4804-a046-2218aa483ea8/xovetikuxuvujegok.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_off0000cfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDB 4968 bytes
SHA-256: c75c75a75ed290d66f1c76addc6f624b5cf4d5667b3b92b41f7e712414080d12
font_01_sfnt_off0000e0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 10048 bytes
SHA-256: c1e1cce84b0847d1c42a042148f8449292206eaa36bd29feba158994338cc2a7
font_02_sfnt_off00010334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10334 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.