Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e04efa8955809b…

MALICIOUS

PDF

84.0 KB Created: 2021-03-27 17:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6905286aa9eccdbe63faff66e23c6286 SHA-1: 1c69e3a48244e1d3a337e4c7cc6b7b4974ac54b9 SHA-256: 16e04efa8955809b671f4ed54f1e0b9fc584a6320efb7d6a3f302a1d2dc2b510
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 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=bomb+lab+phase+6 PDF link annotation
    • https://cdn.sqhk.co/nazujovo/bshbjjK/81309087021.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/xDjjih8/gerasibusawopuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/UUijvhh/daddy_was_a_thief_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/eILNieb/91876311693.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/hgcZAjb/age-_structure_pyramid_definition_apes.pdfIn PDF document text
    • http://ragosur.22web.org/98280653589.pdfIn PDF document text
    • https://cdn.sqhk.co/pajubopolak/aaxghjj/breakfast_sandwich_recipes_healthy.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/ihvjchc/pesobarezawa.pdfIn PDF document text
    • https://cdn.sqhk.co/xomatujod/etjihcf/6692370477.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jorunodup.rf.gd/37978531343.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/1977_cessna_150m_maintenance_manual.pdfIn PDF document text
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_546ddb801fa34848b25aff195da1ab04.pdf?index=trueIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_b3e30084593e4b1baa535a03017f9f8d.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_c091d6b5f37542b781fdc89e8a176353.pdf?index=trueIn PDF document text
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_95882e9adc3e4459a8f33019f7de7acc.pdf?index=trueIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_b377691d8c784ff8882cbca48342e083.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/fumadajorolaligevaro.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/gusosufofupola.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/800555504.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_906c48e7bc8142149f305de28a5bac0f.pdf?index=trueIn PDF document text
    • http://winigoset.rf.gd/munidepigifoboviwafew.pdfIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_32f4f1c2a0b043f08484fecf8d2caf66.pdf?index=trueIn PDF document text
    • http://kimanafidigij.epizy.com/sebomamaxesaxinuzarebufo.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_off0000ff1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1D 3104 bytes
SHA-256: d07e169852596211a84de3e28ecf857a9a91545c36766edd76d5642a73e2a3e4
font_01_sfnt_off00010a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3C 5308 bytes
SHA-256: d3e302345ca7cee62938f46bf9a29657095ee0c58d2936dac5d43319a956b08d
font_02_sfnt_off00011c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C15 11264 bytes
SHA-256: 2933d9c9136e92098508c695d9e5999b1d8e1b5912186ee2046b582ced6edf64