Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c316aaec4c2c55a…

MALICIOUS

PDF

72.4 KB Created: 2021-03-02 15:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f9ae1ae088dfe17a0cf14b8aee20602d SHA-1: 95608c6187d7fa5cd3d304b8048133f1f96955cb SHA-256: 8c316aaec4c2c55a97f6a70d456de73df20b3cdcacf551fcc7723bc7b7d143d9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • 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://mezovuduw.ru/wix?keyword=box+plot+worksheet+pdf PDF link annotation
    • https://vowabogebem.weebly.com/uploads/1/3/0/7/130775978/rudop_kewagulawif_neridan.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/jfgcCgi/73684430247.pdfIn PDF document text
    • https://penatiwateli.weebly.com/uploads/1/3/4/6/134617533/zujanojuwirug.pdfIn PDF document text
    • https://putazixuxul.weebly.com/uploads/1/3/1/3/131379121/lizanikonawe.pdfIn PDF document text
    • https://pozuzedik.weebly.com/uploads/1/3/4/6/134668333/tesam.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/zevutuz.pdfIn PDF document text
    • https://cdn.sqhk.co/gowalitusiwa/ji1icsA/lajizodetudamika.pdfIn PDF document text
    • https://jizesemud.weebly.com/uploads/1/3/2/7/132710762/lebidifepugamu.pdfIn PDF document text
    • https://pofexetebi.weebly.com/uploads/1/3/4/5/134592759/1240984.pdfIn PDF document text
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/witizewubobanibavov.pdfIn PDF document text
    • https://milikosepawina.weebly.com/uploads/1/3/2/6/132696406/8047488.pdfIn PDF document text
    • https://joworuzofoluj.weebly.com/uploads/1/3/2/6/132683209/fediguson.pdfIn PDF document text
    • https://telonilinip.weebly.com/uploads/1/3/6/0/136050587/2755050.pdfIn PDF document text
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/dcfd4a6.pdfIn PDF document text
    • https://feroxetisilujux.weebly.com/uploads/1/3/1/4/131409167/3132136.pdfIn PDF document text
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/e1c5cbead6ab47.pdfIn PDF document text
    • https://kitogabizog.weebly.com/uploads/1/3/6/0/136053612/purejetuv.pdfIn PDF document text
    • https://burodepizojeke.weebly.com/uploads/1/3/2/6/132696233/jifuwejelati.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/gjHigCk/55962787846.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/regufojalojaza/request_for_sabbatical_leave_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/18420055476.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/behavioral_economics_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/lorinevinidazaxom.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_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 5192 bytes
SHA-256: 36d3040564f832b7c5387261f77689032dd8cfdeb4c37431b82af86f9e22b151
font_01_sfnt_off0000f0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 10520 bytes
SHA-256: 8842ecd36885e30f71a7e9ee98611154d86ac072f1ce5ea1c42de84f6ee4d592

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