Malicious PDF — malware analysis report

Static analysis result for SHA-256 1426564e673d53d7…

MALICIOUS

PDF

75.5 KB Created: 2021-02-07 08:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e5c4cfc6651f79e4e8043986a16e652f SHA-1: e97d9b8326cf632a0ace01146fc1814553e2e72e SHA-256: 1426564e673d53d7206a246cfc90013531eb48ea09d3d894aa95b11a0e04f8c7
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 0.9996

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/aws?utm_term=define+inelastic+deformation PDF link annotation
    • https://voxonexagigiwal.weebly.com/uploads/1/3/5/3/135346225/zejarivama-bonijibalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505159/normal_5fc5ea97232cd.pdfIn PDF document text
    • http://jegepev.22web.org/49692098710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_601f757565b8f.pdfIn PDF document text
    • https://fepapiwepum.weebly.com/uploads/1/3/4/3/134382013/a4c2bae0f5.pdfIn PDF document text
    • http://lowazaz.22web.org/jolakuzajoxak.pdfIn PDF document text
    • http://xujosigij.iblogger.org/uniformity_meaning_in_accounting.pdfIn PDF document text
    • https://bizavewes.weebly.com/uploads/1/3/5/3/135323934/karobofaromopex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469841/normal_5ff4d9e227db5.pdfIn PDF document text
    • https://mobejameraxoluv.weebly.com/uploads/1/3/5/3/135316129/72893d6b1cc279a.pdfIn PDF document text
    • https://vixezijimike.weebly.com/uploads/1/3/5/9/135993975/016568544.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404741/normal_5ff88503509f6.pdfIn PDF document text
    • https://womerakuketuzal.weebly.com/uploads/1/3/1/8/131856195/6476f7897df56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448545/normal_6019662f48bd8.pdfIn PDF document text
    • http://tunulawofu.iblogger.org/training_lesson_plan_template_excel.pdfIn PDF document text
    • http://selowopax.22web.org/glen_waverley_school_uniform.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://wikilupari.epizy.com/2995985732.pdfIn PDF document text
    • http://lizomepikoxi.epizy.com/61955981881.pdfIn PDF document text
    • http://rakejobik.epizy.com/tricep_dips_proper_form.pdfIn PDF document text
    • http://gudanomakorake.epizy.com/gazedovivuwukidop.pdfIn PDF document text
    • http://ruberosorodoge.epizy.com/9231606345.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE08 4956 bytes
SHA-256: b34f4c593c726908652c200528a1bcfd220d78456a444e7f92a0e5b4a4b636ce
font_01_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 10328 bytes
SHA-256: 918e311e097d067a4bde4532ee5ececa9b871296ce9fc3997566dbf47270b592
font_02_sfnt_off00011155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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