Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a5d68b2f6ba258…

MALICIOUS

PDF

76.8 KB Created: 2021-03-08 10:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d11cdf7d7899fb82e805293be2d56443 SHA-1: 088e92f8bd66df235b0c4a16fe3260a8d68c7d2c SHA-256: c3a5d68b2f6ba258828c657e088fa5635043be17edd2fc2e9853e475a389a20d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It contains numerous external links, with one prominent URL pointing to a link farm designed to redirect users. The file's structure and the presence of embedded URLs suggest it is intended to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/wb?keyword=cursos%20de%20ingles%20en%20orlando%20precios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475859/normal_5fcc6d31e54c7.pdfIn PDF document text
    • https://tigekinoninufuv.weebly.com/uploads/1/3/4/6/134687643/cdb980fbdb9e42.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/do_the_words_mom_and_dad_need_to_be_capitalized.pdfIn PDF document text
    • https://memuvarava.weebly.com/uploads/1/3/1/3/131384606/cf6d074ba93608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_6019dbd088305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_601cb096a5146.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/panasonic_microwave_oven_nn-sn766s.pdfIn PDF document text
    • http://center-san.ru/autobiografia_de_un_hombre_felizkzkn4.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/69639384367.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/xejejepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453550/normal_5fd6292c5cd37.pdfIn PDF document text
    • https://nobobigo.weebly.com/uploads/1/3/4/4/134403715/5785719.pdfIn PDF document text
    • http://zoo-taxi.site/bilamiziwetekurenosewoze5yeng.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/how_do_i_reset_my_funlux_camera.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/65982190754.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/beko_hbs_7600w.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/7704776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_5fdbc7d18f0c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutaturusix.myartsonline.com/barunabewezuxo.pdfIn PDF document text
    • http://malejubu.myartsonline.com/sijulogepuwebeg.pdfIn PDF document text
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_0f21c42e7598412a8172fa69201a6fe0.pdf?index=trueIn PDF document text
    • http://miganuvag.myartsonline.com/15714574529.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_1070cf380809466f8065b0970740aa2e.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5144 bytes
SHA-256: e78aa4d75f533cd71136d2023add82b6fad4d6fc439cb3947b664bbf128df174
font_01_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 11788 bytes
SHA-256: 5a987bcf16e6d2180b401023d73d35a85d4573644861f0ed57422bc4f8f2d292

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