Malicious PDF — malware analysis report

Static analysis result for SHA-256 22535263aedaca5e…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 21:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bdea8c0715fa2c4c00011ba113f2c899 SHA-1: 294dfbfe97f10e944d740e3880eae8275acbdd7f SHA-256: 22535263aedaca5e844f883f6581dfc3dd5e9a7c877ad55dfb7bbe68f98cb08b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable domains and unknown reputations, suggesting a link farm or redirection scheme to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to a 'graduation party checklist template'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/123?utm_term=graduation+party+checklist+template PDF link annotation
    • http://1xbets-regs.site/108703972970udq9.pdfIn PDF document text
    • http://dietnatur.fun/power_of_love_celine_dion_piano_sheet_musict4uz3.pdfIn PDF document text
    • http://oneitshop.info/51701819501xjhbu.pdfIn PDF document text
    • http://xeeewq.xyz/1427310148546jwn.pdfIn PDF document text
    • http://procripton.com/sisibapamekawifemalilozpthg.pdfIn PDF document text
    • http://serviceforyou.site/who_wrote_the_quran_and_how_was_it_put_together_in_urduwl2v9.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/385605.pdfIn PDF document text
    • http://tafuvomilo.22web.org/80606332308.pdfIn PDF document text
    • https://lorudopop.weebly.com/uploads/1/3/4/3/134315835/gasadonipidupeja.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/354a93511.pdfIn PDF document text
    • http://my-favshop.online/chaos_walking_book_2gow6l.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/edit_converted_to_word_document.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/genedesowul/18406517728.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/95013187189.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/bms_performance_sales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb94ee19-599f-495b-a884-d896d13d0df5/romosowo.pdfIn PDF document text
    • http://wedizakur.epizy.com/guillotine_cross_leveling_guide.pdfIn PDF document text
    • http://xakizilixoz.epizy.com/xowekodosibotipumediwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a4c7c7-72b1-4bc0-b557-0bae56ac1192/language_development_12-24_months.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b776191-f835-44f2-8116-a6dea6cf52f9/free_2001_vw_beetle_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/free_printable_elementary_lesson_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904addee-f42b-48fd-8543-796b68493116/14111890535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/940241b0-d3e0-4ff6-9953-b3550c934e51/50318754302.pdfIn PDF document text
    • http://dovanokeji.epizy.com/58899991578.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_off0000ea16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 5508 bytes
SHA-256: fe7c983b3a10bc88b03f05d8b570d1c8af543d197d9b66623c572c945f37bbb3
font_01_sfnt_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 11004 bytes
SHA-256: 7c2f91ac345a6c623863c2b7c07a03fc9c4d37364383741fae2f440432689aac

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