Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c551185820e6c8…

MALICIOUS

PDF

71.3 KB Created: 2021-02-04 12:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fa549becc03c705a385d0b9912c57c00 SHA-1: eb097826d0dcb3392af0dccd3bfd4a7fb7456906 SHA-256: e9c551185820e6c8836673cb158a340ff3c06857ec4f0eb32bf24c432a0ce188
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one specifically targeting 'Sedalia school district foundation', suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=sedalia+school+district+foundation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5fd22fbbebc02.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/mekekinubawiverulu.pdfIn PDF document text
    • http://tazikuruwuwozu.22web.org/fevirolopaveda.pdfIn PDF document text
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/leguririzaxiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5fe7c9af5d6cf.pdfIn PDF document text
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/wizonesojituxalujase.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417312/normal_6002c27e909ba.pdfIn PDF document text
    • https://ligonulijer.weebly.com/uploads/1/3/5/3/135318365/rotafazi_rizepix_sepebabivi_fazudivime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369343/normal_5fdebe90acdf1.pdfIn PDF document text
    • https://numemepo.weebly.com/uploads/1/3/0/9/130969514/8816962.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rewejuvozotu.epizy.com/rosowidizike.pdfIn PDF document text
    • http://nokemufebevezo.rf.gd/53989195853.pdfIn PDF document text
    • http://siwofemevap.epizy.com/63255306142.pdfIn PDF document text
    • http://xeravujowa.epizy.com/bixira.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/kugasifupajiwojajati.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC826 5092 bytes
SHA-256: b8bbf0bc9317ebe7201e814adcc605653f9a34f1fa25c7450d45189d2bafe508
font_01_sfnt_off0000d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 12312 bytes
SHA-256: 80739195f3c697645ad1fa879781c86c74ccb0a1e131cd2b2554f3a52e7629e8
font_02_sfnt_off00010095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10095 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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