Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aeee6ff3c342522…

MALICIOUS

PDF

80.4 KB Created: 2021-03-24 09:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e643f46fd60ac9c773202d939b6d23af SHA-1: 0f456067664c5b89591a6e35cd949024578f3520 SHA-256: 7aeee6ff3c3425221dde43c226d9c583b273ddf47a104c8282ac542b18c46f86
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is flagged as external. Heuristics indicate the PDF acts as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/strik?utm_term=what+is+world+literature+and+its+importance PDF link annotation
    • http://lipazegeboludep.sportsontheweb.net/36119033802.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/58652902512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490739/normal_604151398dabd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_600ea63b199e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_60227687265f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fd09345d7d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_5fda51fa18a44.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/my_little_pony_the_sims_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_6028e579c5a72.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/child_adolescent_and_family_development.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388174/normal_5fe4b2659c8bb.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/comprehensive_pharmacy_review_for_naplex_practice_exams_cases_and_test_prep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_5fd71243c312c.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/tabela_anexo_vi_simples_nacional.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408323/normal_604df3db0c7dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezetega/voneluvikom.pdfIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_3a60ef95cfe24e2e935f20e444edc5a1.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_11ede9f2ed6140b9a8cf334ef8fc0bca.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_f563bb2df2df4063b9d7ee6e6c23b85f.pdf?index=trueIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_03e1e93137314b448b6da52b67f85afc.pdf?index=trueIn PDF document text
    • http://zilisidojaze.myartsonline.com/netibedugixo.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_7b201081484840148955017995ddfff1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/up_caste_certificate_verification_online_form.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 5420 bytes
SHA-256: fdc88ff32800f45dbb0abc9842edb1a9b4db92784bf2d639c26542fc0b68f754
font_01_sfnt_off0001101d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101D 10588 bytes
SHA-256: bad9a5c4bedefa80d1bf0660408be19b0f897e0d9157c306fd902245e41fee20

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