Malicious PDF — malware analysis report

Static analysis result for SHA-256 d151018b1e2cc2ae…

MALICIOUS

PDF

77.8 KB Created: 2021-06-05 06:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 085af0e28ad79970e139bc4d154d863b SHA-1: 5f76aeabc8ee5b4d36c290e777f22e9e29baffd1 SHA-256: d151018b1e2cc2ae5042756aeb108ccefc4ccae917076f8e50bb978fe8164c00
226 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged as a link farm. The document body, though heavily garbled, contains text related to downloading game content, suggesting a lure. The presence of ClamAV detection and ML classification strongly indicates malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://drafthe.ru/pbw?utm_term=descargar+todos+los+yu+gi+oh+power+of+chaos+en+espa%25C3%25B1ol+mega PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475406/normal_6017629a6594e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_60061e760b836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379855/normal_6005a15f7ec6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_60688b34ef842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_604d9b31214b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_605de45e0bcff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_6065775c86a67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380213/normal_5feb89efe6c29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5fcf96ed2f027.pdfIn PDF document text
    • https://woxevawalonot.weebly.com/uploads/1/3/7/5/137517472/didiwenewinuvef_pipapifuvako_kugexukuwogak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_6021722bc7d99.pdfIn PDF document text
    • https://fikepeti.weebly.com/uploads/1/3/4/4/134489659/tufisufedasite_kogove_jeloxulubomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runaliguredu.pbworks.com/w/file/fetch/144442815/how_to_read_computer_binary_code.pdfIn PDF document text
    • http://daridameku.pbworks.com/w/file/fetch/144640779/kuxofuxezevumij.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/how_much_does_it_cost_to_file_a_quit_claim_deed_in_florida.pdfIn PDF document text
    • http://wezenibafasi.pbworks.com/f/nepaduwipunapipexufufogu.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144584562/whatsapp_business_for_pc_free_download.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/service_manual_suzuki_vitara_ly.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/descargar_block_story_premium_hackeado.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/f/7407088004.pdfIn PDF document text
    • http://paditoxef.pbworks.com/w/file/fetch/144485556/how_to_use_jbl_flip_3.pdfIn PDF document text
    • http://biwonuv.pbworks.com/f/somewhere_over_the_rainbow_piano_sheet_free.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://adf.ly/1ULJGyIn 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_off0000e949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 5976 bytes
SHA-256: 827dce439422f1266a48f88c0aa27ddaaf5d718c71e223849e95036c70b75335
font_01_sfnt_off0000fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD55 12592 bytes
SHA-256: b92db68b8824e7cb80b6773c1157ce514dda79ca00ebbd1c66e690463ba3c4b8