Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa1a68c2fc8480a…

MALICIOUS

PDF

76.4 KB Created: 2021-04-22 22:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e220b65eb32ab688f194bcb09374133 SHA-1: dd8f8814a4768b857663930630fc35e79e8888a6 SHA-256: 0fa1a68c2fc8480a7b0cc5b32a76e2801d139e381f175c35111f2db7bba7d891
186 Risk Score

Malware Insights

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

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 0.9998

Heuristics 6

  • 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.
  • 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://bologen.ru/strik?utm_term=visual+studio+code+tutorial+html PDF link annotation
    • https://cdn.sqhk.co/rivotoxupow/Nifaox5/world_war_z_game_download_for_android.pdfIn PDF document text
    • https://losezereveki.weebly.com/uploads/1/3/5/2/135296388/8799959.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/resuro.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/vakikexavobazu.pdfIn PDF document text
    • https://gikatufezido.weebly.com/uploads/1/3/4/3/134338368/xonosob_buvosove.pdfIn PDF document text
    • https://kogejuxo.weebly.com/uploads/1/3/1/6/131606118/wedow.pdfIn PDF document text
    • https://nedamekiwuj.weebly.com/uploads/1/3/1/3/131379605/vijir.pdfIn PDF document text
    • https://cdn.sqhk.co/xadopazo/ifoji0h/bigo_live_app_for_pc_free.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/fumibujudagaxupapiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/hehgrjc/nick_jonas_height_in_feet.pdfIn PDF document text
    • https://lesapexif.weebly.com/uploads/1/3/1/6/131637780/neremarilor_tilirotale_zanamare.pdfIn PDF document text
    • https://zizovotitimojuv.weebly.com/uploads/1/3/2/7/132712514/19b4c9042de4.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
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_6a5268c18cbb46e4b2ecb2fc3b565dc5.pdf?index=trueIn PDF document text
    • https://37cc4ef3-276f-49d0-84f3-8bc08bbde6a9.filesusr.com/ugd/e4a5d4_b098d578ca0f442db36dee9de4906955.pdf?index=trueIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_1d9dc8770d48444bb77a891f5e50ee62.pdf?index=trueIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_1b6a4d16bfdc4d3a9c40d7537e94d8f0.pdf?index=trueIn PDF document text
    • http://nibizuladode.onlinewebshop.net/96032828689.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/how_to_program_the_clicker_garage_door_opener.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_off0000e4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DE 4920 bytes
SHA-256: 605f9c13b5ca8ababeda4c7ed071a3d3e9fb770112c9c8fb9e390d40eb38e96e
font_01_sfnt_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 9596 bytes
SHA-256: c1457ea9f5d70fa77457d6b35ee8bdaf53ba46272e3abad99609838dd4898dea
font_02_sfnt_off00011681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11681 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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