Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61b2023286b6590…

MALICIOUS

PDF

169.1 KB Created: 2021-03-22 06:17:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: aa339b93ccfbd3c727b662b29fd0f4d5 SHA-1: 550a8a1fb1c60f027e66ba3fee65c8b77d5f364d SHA-256: f61b2023286b65903b367525b266e04f4d970398851b3ec21f0eb110eb30d153
126 Risk Score

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 0.9990

Heuristics 5

  • 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 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://dafemum.ru/award?keyword=definicion+de+ansiolitico+pdf PDF link annotation
    • http://tuwukadinem.mygamesonline.org/histoire_pour_apprendre_le_franais.pdfIn PDF document text
    • http://mofolaz.22web.org/karebagixamimu.pdfIn PDF document text
    • http://beruvutekimeged.22web.org/pulanevaduropoki.pdfIn PDF document text
    • http://ens-pictures.ru/5386903164od35p.pdfIn PDF document text
    • http://bostpolamos.site/waste_shredder_machine_price_philippinesmj2l8.pdfIn PDF document text
    • http://homeolimp.com/e_myth_revisited_audiobook7a2zq.pdfIn PDF document text
    • http://invitesistem.ru/amplificador_de_instrumentacion_ganancia_1000axarz.pdfIn PDF document text
    • http://store50off.info/27873920300py4qc.pdfIn PDF document text
    • http://jugapus.sportsontheweb.net/27805636659.pdfIn PDF document text
    • http://jupulapigivux.22web.org/artificial_intelligence_in_medicine.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/bergson_matter_and_memory.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_253f382fa9e54d84975903329fb3d021.pdf?index=trueIn PDF document text
    • http://dexexofavigemil.epizy.com/rusekezozadu.pdfIn PDF document text
    • http://dinedolorexos.rf.gd/being_a_great_leader.pdfIn PDF document text
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_a22694a22d0f445a880a0f855fe0bb13.pdf?index=trueIn PDF document text
    • http://fojupejededoto.epizy.com/angular_formcontrolname_nested_property.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/genogram_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/best_mind_game_apps_for_android.pdfIn PDF document text
    • http://kawobos.rf.gd/gidofedovesozogi.pdfIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_09964826a52a4f02bf025f5013433ce3.pdf?index=trueIn PDF document text
    • http://timojodabemisux.myartsonline.com/nonajuj.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_4451bc1572c54bc1a050026f2f97718d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lonozote/40689496258.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24EB7 5052 bytes
SHA-256: e1c1a18cce86050e0264744c5ca5ba5c7c3742f82a2f112363126317602c5269
font_01_sfnt_off00026008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26008 17576 bytes
SHA-256: d353c223f04a2c3fc2f90155bd79575f91961bf6559bde4fbad767b840b0f9a6

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