Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1650cc0e59b5297…

MALICIOUS

PDF

69.3 KB Created: 2021-03-14 03:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1ea1102ee78366f58432efbb9167c7f2 SHA-1: 3d8afad0dde0e57ae08a5a4e08dd63e67c7aa6ff SHA-256: a1650cc0e59b5297baf896d67d6f1d24c5c1ca8ac2f0a604342fd2ccf4eb8bae
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to redirect users to malicious websites. The ClamAV detection and ML classifier also indicate malicious intent. The primary lure appears to be an 'advanced java tutorial pdf download', which is likely a pretext to drive traffic to the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6346

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 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
  • 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://baarspo.ru/award?keyword=advanced+java+tutorial+pdf+download PDF link annotation
    • https://cdn.sqhk.co/navififoro/eHidhgP/my_movies_pro_3.pdfIn PDF document text
    • https://cdn.sqhk.co/givikufat/71qieXd/99208474179.pdfIn PDF document text
    • http://zofosopu.22web.org/gotuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/O3mghjb/21166418742.pdfIn PDF document text
    • http://mafewagidimu.22web.org/libelegekezipagivuneda.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/hHicies/56723208166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_5ff11897d7006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_601ec97255e1d.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/kZhhgcO/pumimiterawaxe.pdfIn PDF document text
    • http://banigigafizaje.epizy.com/baixar_reader_gratis_em_portugues.pdfIn PDF document text
    • http://kenasaxoxaxober.rf.gd/41880588443.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/15718035850.pdfIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_83dfb56d7346454aa03693b67c4e02aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/32422926566.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/pezazogud.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_de5e04415e46413b98d487fe21d75d1c.pdf?index=trueIn PDF document text
    • http://rilifufamorupud.epizy.com/88183496347.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_982c64bb8ab842c89a1dd3199456d742.pdf?index=trueIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_c03a669b0c5e47e68ab83fedbf5803a4.pdf?index=trueIn PDF document text
    • http://dejovosag.epizy.com/jusimixazane.pdfIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_1f788ec11bb546379813f31452b42c26.pdf?index=trueIn PDF document text