Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7af66bbbd35ce7a…

MALICIOUS

PDF

71.4 KB Created: 2021-04-05 11:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c288ce440c44c1bcc0928623795614e0 SHA-1: 5704ad20f503d523a5941c7b72c21c1432b091af SHA-256: d7af66bbbd35ce7aa99e6d70061c76a84d51bdc010bdea82a3bd57868d8efb3a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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 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://kuzutuzo.ru/award?keyword=ariston+velis+evo+100+manual+pdf PDF link annotation
    • https://xekadefu.weebly.com/uploads/1/3/4/5/134597434/5526860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_6064e5b421537.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/2007005.pdfIn PDF document text
    • http://baltika-trans.ru/56797053326dsev7.pdfIn PDF document text
    • https://rakamirun.weebly.com/uploads/1/3/4/9/134904708/43630447.pdfIn PDF document text
    • http://1freedom.space/introduction_to_financial_accountingthlv0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462730/normal_601906558d3d5.pdfIn PDF document text
    • https://rekopazexejur.weebly.com/uploads/1/3/4/6/134602417/xovexetota_webobonun_lujuvipuwesuko.pdfIn PDF document text
    • http://erethiztzj.space/gilujepqq8db.pdfIn PDF document text
    • http://petersikdar.com/desekemaxv7ik.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/juvijagejodovu9m2xl.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/mabeduzefubakugixsdhxs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_6061f1c11b876.pdfIn PDF document text
    • https://wifojulov.weebly.com/uploads/1/3/1/4/131438113/8277840.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417214/normal_5fd081f3a064f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_6017791a75fd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosuronuvure.epizy.com/corporate_bylaws.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/serial_de_windows_8.1_pro_n_64_bits.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_78a3e68e37c3496f9c9f0b57841de24e.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_ccbcdcd295c3401abcd3612213386341.pdf?index=trueIn PDF document text
    • http://mozolawaguj.epizy.com/migisenebup.pdfIn PDF document text
    • http://dukodisedibuji.epizy.com/tesis_valores_morales.pdfIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_0ce8476566c34874a00d1296529c89c8.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_off0000d7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E6 5428 bytes
SHA-256: dea4ba536a50075433c87f471442a7507d90eecc652e53a659b7591493137ffc
font_01_sfnt_off0000ea52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA52 11104 bytes
SHA-256: 749195ae889fc27df2378755a84baaf487d11e181804b8a329422dbdc01159a9

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