Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ef2aff5282a054…

MALICIOUS

PDF

70.4 KB Created: 2021-01-28 17:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d4ddeee673d03b760bf94bbf5d8b6bb1 SHA-1: db5e95a1c5a523457e7dce4235e5070f3264c5ab SHA-256: a5ef2aff5282a054221b2c57965ca8cd08a47e0c839bfe7b1fb4f7d821bb551d
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/wb?keyword=iphone%20notification%20ringtone%20free%20download PDF link annotation
    • http://sunshop.pro/capitalism_examples_in_canadaqc7ck.pdfIn PDF document text
    • https://zadujogor.weebly.com/uploads/1/3/1/4/131406982/zudaxado.pdfIn PDF document text
    • http://gatorama.fun/9506690200xtk6c.pdfIn PDF document text
    • https://mobesometug.weebly.com/uploads/1/3/4/6/134644263/vetupitag-bekenid-jepikoxese.pdfIn PDF document text
    • https://rumirasikimuzib.weebly.com/uploads/1/3/2/7/132710795/xuweja_xaxakuribiwuwu_lekoteguju.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/vomisuxidite.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/417234575666qzf3.pdfIn PDF document text
    • http://takipleskazan.org/gartner_firewall_report_2019fbo70.pdfIn PDF document text
    • https://deluwibenarut.weebly.com/uploads/1/3/1/3/131382693/wudemovere.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/ziziza.pdfIn PDF document text
    • https://wenudujajavu.weebly.com/uploads/1/3/5/3/135318124/4113650.pdfIn PDF document text
    • http://tovelksa.website/mevovisujuvewovibatimag883np.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/pitidisopude_soxezodola_posujozo.pdfIn PDF document text
    • https://tomutoremaduv.weebly.com/uploads/1/3/1/3/131398477/de41f9.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/ludixexekud-rovide-vifokomisewiwuf-wepelij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD600 5268 bytes
SHA-256: 6cf1c1dfea24a5818b7a5f0230a5f3266d64da40c0c6266aca4c1fd67813354a
font_01_sfnt_off0000e7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FC 10700 bytes
SHA-256: ab1ceac8bd6d4a8d247542153b9942138bd1ea49641b1a01431895703d60dcb7

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